diff --git a/Doc/install/index.rst b/Doc/install/index.rst
index d0fea3d..8f3ad72 100644
--- a/Doc/install/index.rst
+++ b/Doc/install/index.rst
@@ -1012,7 +1012,7 @@
 
 .. seealso::
 
-   `C++Builder Compiler <http://www.codegear.com/downloads/free/cppbuilder>`_
+   `C++Builder Compiler <http://www.embarcadero.com/downloads>`_
       Information about the free C++ compiler from Borland, including links to the
       download pages.
 
@@ -1084,7 +1084,7 @@
 
 .. seealso::
 
-   `Building Python modules on MS Windows platform with MinGW <http://www.zope.org/Members/als/tips/win32_mingw_modules>`_
+   `Building Python modules on MS Windows platform with MinGW <http://old.zope.org/Members/als/tips/win32_mingw_modules>`_
       Information about building the required libraries for the MinGW environment.
 
 
@@ -1093,7 +1093,7 @@
 .. [#] This also means you could replace all existing COFF-libraries with OMF-libraries
    of the same name.
 
-.. [#] Check http://sources.redhat.com/cygwin/ and http://www.mingw.org/ for more
+.. [#] Check http://www.sourceware.org/cygwin/ and http://www.mingw.org/ for more
    information
 
 .. [#] Then you have no POSIX emulation available, but you also don't need
diff --git a/Doc/installing/index.rst b/Doc/installing/index.rst
index 5db9bbb..973c689 100644
--- a/Doc/installing/index.rst
+++ b/Doc/installing/index.rst
@@ -104,7 +104,7 @@
 .. seealso::
 
     `Python Packaging User Guide: Installing Python Distribution Packages
-    <https://packaging.python.org/en/latest/installing.html#installing-python-distributions>`__
+    <https://packaging.python.org/en/latest/installing.html#installing-python-distribution-packages>`__
 
 
 How do I ...?
@@ -122,7 +122,7 @@
 .. seealso::
 
    `Python Packaging User Guide: Setup for Installing Distribution Packages
-   <https://packaging.python.org/en/latest/installing.html#setup-for-installing-distributions>`__
+   <https://packaging.python.org/en/latest/installing.html#setup-for-installing-distribution-packages>`__
 
 
 .. installing-per-user-installation:
@@ -141,13 +141,13 @@
 aren't currently easy to install using ``pip`` directly. At this point in
 time, it will often be easier for users to install these packages by
 `other means
-<https://packaging.python.org/en/latest/platforms.html#installing-scientific-packages>`__
+<https://packaging.python.org/en/latest/science.html>`__
 rather than attempting to install them with ``pip``.
 
 .. seealso::
 
    `Python Packaging User Guide: Installing Scientific Packages
-   <https://packaging.python.org/en/latest/platforms.html#installing-scientific-packages>`__
+   <https://packaging.python.org/en/latest/science.html>`__
 
 
 ... work with multiple versions of Python installed in parallel?
@@ -210,7 +210,7 @@
 than needing to build them themselves.
 
 Some of the solutions for installing `scientific software
-<https://packaging.python.org/en/latest/platforms.html#installing-scientific-packages>`__
+<https://packaging.python.org/en/latest/science.html>`__
 that is not yet available as pre-built ``wheel`` files may also help with
 obtaining other binary extensions without needing to build them locally.
 
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index 1651ef5..d8339b5 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -109,7 +109,7 @@
       writing to any mapping in the chain.
 
     * Django's `Context class
-      <http://code.djangoproject.com/browser/django/trunk/django/template/context.py>`_
+      <https://github.com/django/django/blob/master/django/template/context.py>`_
       for templating is a read-only chain of mappings.  It also features
       pushing and popping of contexts similar to the
       :meth:`~collections.ChainMap.new_child` method and the
diff --git a/Doc/library/difflib.rst b/Doc/library/difflib.rst
index 2a75d2c..5f72ea6 100644
--- a/Doc/library/difflib.rst
+++ b/Doc/library/difflib.rst
@@ -323,9 +323,9 @@
 
 .. seealso::
 
-   `Pattern Matching: The Gestalt Approach <http://www.ddj.com/184407970?pgno=5>`_
+   `Pattern Matching: The Gestalt Approach <http://www.drdobbs.com/database/pattern-matching-the-gestalt-approach/184407970>`_
       Discussion of a similar algorithm by John W. Ratcliff and D. E. Metzener. This
-      was published in `Dr. Dobb's Journal <http://www.ddj.com/>`_ in July, 1988.
+      was published in `Dr. Dobb's Journal <http://www.drdobbs.com/>`_ in July, 1988.
 
 
 .. _sequence-matcher:
diff --git a/Doc/library/distribution.rst b/Doc/library/distribution.rst
index fb3f5df..c4954d1 100644
--- a/Doc/library/distribution.rst
+++ b/Doc/library/distribution.rst
@@ -4,7 +4,7 @@
 
 These libraries help you with publishing and installing Python software.
 While these modules are designed to work in conjunction with the
-`Python Package Index <https://pypi.python.org>`__, they can also be used
+`Python Package Index <https://pypi.python.org/pypi>`__, they can also be used
 with a local index server, or without any index server at all.
 
 .. toctree::
diff --git a/Doc/library/functools.rst b/Doc/library/functools.rst
index 96645c3..7fd7d58 100644
--- a/Doc/library/functools.rst
+++ b/Doc/library/functools.rst
@@ -72,7 +72,7 @@
    bypassing the cache, or for rewrapping the function with a different cache.
 
    An `LRU (least recently used) cache
-   <http://en.wikipedia.org/wiki/Cache_algorithms#Least_Recently_Used>`_ works
+   <http://en.wikipedia.org/wiki/Cache_algorithms#Examples>`_ works
    best when the most recent calls are the best predictors of upcoming calls (for
    example, the most popular articles on a news server tend to change each day).
    The cache's size limit assures that the cache does not grow without bound on
diff --git a/Doc/library/gettext.rst b/Doc/library/gettext.rst
index 982780f..ff23b59 100644
--- a/Doc/library/gettext.rst
+++ b/Doc/library/gettext.rst
@@ -460,7 +460,7 @@
 internationalization library that includes a :file:`pybabel` script to
 extract and compile message catalogs.  François Pinard's program
 called :program:`xpot` does a similar job and is available as part of
-his `po-utils package <http://po-utils.progiciels-bpi.ca/>`__.
+his `po-utils package <https://github.com/pinard/po-utils>`__.
 
 (Python also includes pure-Python versions of these programs, called
 :program:`pygettext.py` and :program:`msgfmt.py`; some Python distributions
diff --git a/Doc/library/http.cookiejar.rst b/Doc/library/http.cookiejar.rst
index 2fae47c..1f6b1ba 100644
--- a/Doc/library/http.cookiejar.rst
+++ b/Doc/library/http.cookiejar.rst
@@ -115,7 +115,7 @@
       :mod:`http.cookiejar` and :mod:`http.cookies` modules do not depend on each
       other.
 
-   http://wp.netscape.com/newsref/std/cookie_spec.html
+   http://curl.haxx.se/rfc/cookie_spec.html
       The specification of the original Netscape cookie protocol.  Though this is
       still the dominant protocol, the 'Netscape cookie protocol' implemented by all
       the major browsers (and :mod:`http.cookiejar`) only bears a passing resemblance to
diff --git a/Doc/library/mailbox.rst b/Doc/library/mailbox.rst
index a03fd1c..6334bd6 100644
--- a/Doc/library/mailbox.rst
+++ b/Doc/library/mailbox.rst
@@ -487,7 +487,7 @@
    `Configuring Netscape Mail on Unix: Why The Content-Length Format is Bad <http://www.jwz.org/doc/content-length.html>`_
       An argument for using the original mbox format rather than a variation.
 
-   `"mbox" is a family of several mutually incompatible mailbox formats <http://homepages.tesco.net./~J.deBoynePollard/FGA/mail-mbox-formats.html>`_
+   `"mbox" is a family of several mutually incompatible mailbox formats <http://homepage.ntlworld.com/jonathan.deboynepollard/FGA/mail-mbox-formats.html>`_
       A history of mbox variations.
 
 
diff --git a/Doc/library/msilib.rst b/Doc/library/msilib.rst
index d3451c8..4145c8e 100644
--- a/Doc/library/msilib.rst
+++ b/Doc/library/msilib.rst
@@ -120,9 +120,9 @@
 
 .. seealso::
 
-   `FCICreateFile <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devnotes/winprog/fcicreate.asp>`_
-   `UuidCreate <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/rpc/rpc/uuidcreate.asp>`_
-   `UuidToString <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/rpc/rpc/uuidtostring.asp>`_
+   `FCICreateFile <http://msdn.microsoft.com/library?url=/library/en-us/devnotes/winprog/fcicreate.asp>`_
+   `UuidCreate <http://msdn.microsoft.com/library?url=/library/en-us/rpc/rpc/uuidcreate.asp>`_
+   `UuidToString <http://msdn.microsoft.com/library?url=/library/en-us/rpc/rpc/uuidtostring.asp>`_
 
 .. _database-objects:
 
@@ -151,9 +151,9 @@
 
 .. seealso::
 
-   `MSIDatabaseOpenView <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msidatabaseopenview.asp>`_
-   `MSIDatabaseCommit <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msidatabasecommit.asp>`_
-   `MSIGetSummaryInformation <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msigetsummaryinformation.asp>`_
+   `MSIDatabaseOpenView <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msidatabaseopenview.asp>`_
+   `MSIDatabaseCommit <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msidatabasecommit.asp>`_
+   `MSIGetSummaryInformation <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msigetsummaryinformation.asp>`_
 
 .. _view-objects:
 
@@ -199,11 +199,11 @@
 
 .. seealso::
 
-   `MsiViewExecute <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msiviewexecute.asp>`_
-   `MSIViewGetColumnInfo <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msiviewgetcolumninfo.asp>`_
-   `MsiViewFetch <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msiviewfetch.asp>`_
-   `MsiViewModify <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msiviewmodify.asp>`_
-   `MsiViewClose <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msiviewclose.asp>`_
+   `MsiViewExecute <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msiviewexecute.asp>`_
+   `MSIViewGetColumnInfo <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msiviewgetcolumninfo.asp>`_
+   `MsiViewFetch <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msiviewfetch.asp>`_
+   `MsiViewModify <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msiviewmodify.asp>`_
+   `MsiViewClose <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msiviewclose.asp>`_
 
 .. _summary-objects:
 
@@ -243,10 +243,10 @@
 
 .. seealso::
 
-   `MsiSummaryInfoGetProperty <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msisummaryinfogetproperty.asp>`_
-   `MsiSummaryInfoGetPropertyCount <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msisummaryinfogetpropertycount.asp>`_
-   `MsiSummaryInfoSetProperty <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msisummaryinfosetproperty.asp>`_
-   `MsiSummaryInfoPersist <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msisummaryinfopersist.asp>`_
+   `MsiSummaryInfoGetProperty <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msisummaryinfogetproperty.asp>`_
+   `MsiSummaryInfoGetPropertyCount <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msisummaryinfogetpropertycount.asp>`_
+   `MsiSummaryInfoSetProperty <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msisummaryinfosetproperty.asp>`_
+   `MsiSummaryInfoPersist <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msisummaryinfopersist.asp>`_
 
 .. _record-objects:
 
@@ -297,11 +297,11 @@
 
 .. seealso::
 
-   `MsiRecordGetFieldCount <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msirecordgetfieldcount.asp>`_
-   `MsiRecordSetString <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msirecordsetstring.asp>`_
-   `MsiRecordSetStream <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msirecordsetstream.asp>`_
-   `MsiRecordSetInteger <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msirecordsetinteger.asp>`_
-   `MsiRecordClear <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/msirecordclear.asp>`_
+   `MsiRecordGetFieldCount <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msirecordgetfieldcount.asp>`_
+   `MsiRecordSetString <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msirecordsetstring.asp>`_
+   `MsiRecordSetStream <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msirecordsetstream.asp>`_
+   `MsiRecordSetInteger <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msirecordsetinteger.asp>`_
+   `MsiRecordClear <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/msirecordclear.asp>`_
 
 .. _msi-errors:
 
@@ -393,10 +393,10 @@
 
 .. seealso::
 
-   `Directory Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/directory_table.asp>`_
-   `File Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/file_table.asp>`_
-   `Component Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/component_table.asp>`_
-   `FeatureComponents Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/featurecomponents_table.asp>`_
+   `Directory Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/directory_table.asp>`_
+   `File Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/file_table.asp>`_
+   `Component Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/component_table.asp>`_
+   `FeatureComponents Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/featurecomponents_table.asp>`_
 
 .. _features:
 
@@ -421,7 +421,7 @@
 
 .. seealso::
 
-   `Feature Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/feature_table.asp>`_
+   `Feature Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/feature_table.asp>`_
 
 .. _msi-gui:
 
@@ -516,13 +516,13 @@
 
 .. seealso::
 
-   `Dialog Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/dialog_table.asp>`_
-   `Control Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/control_table.asp>`_
-   `Control Types <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/controls.asp>`_
-   `ControlCondition Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/controlcondition_table.asp>`_
-   `ControlEvent Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/controlevent_table.asp>`_
-   `EventMapping Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/eventmapping_table.asp>`_
-   `RadioButton Table <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/radiobutton_table.asp>`_
+   `Dialog Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/dialog_table.asp>`_
+   `Control Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/control_table.asp>`_
+   `Control Types <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/controls.asp>`_
+   `ControlCondition Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/controlcondition_table.asp>`_
+   `ControlEvent Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/controlevent_table.asp>`_
+   `EventMapping Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/eventmapping_table.asp>`_
+   `RadioButton Table <http://msdn.microsoft.com/library?url=/library/en-us/msi/setup/radiobutton_table.asp>`_
 
 .. _msi-tables:
 
diff --git a/Doc/library/othergui.rst b/Doc/library/othergui.rst
index 2d51491..73f868a 100644
--- a/Doc/library/othergui.rst
+++ b/Doc/library/othergui.rst
@@ -10,7 +10,7 @@
 
    `PyGObject <https://live.gnome.org/PyGObject>`_
       provides introspection bindings for C libraries using
-      `GObject <http://developer.gnome.org/gobject/stable/>`_.  One of
+      `GObject <https://developer.gnome.org/gobject/stable/>`_.  One of
       these libraries is the `GTK+ 3 <http://www.gtk.org/>`_ widget set.
       GTK+ comes with many more widgets than Tkinter provides.  An online
       `Python GTK+ 3 Tutorial <http://python-gtk-3-tutorial.readthedocs.org/en/latest/>`_
diff --git a/Doc/library/plistlib.rst b/Doc/library/plistlib.rst
index 6a2d6b4..2bef120 100644
--- a/Doc/library/plistlib.rst
+++ b/Doc/library/plistlib.rst
@@ -37,7 +37,7 @@
 
 .. seealso::
 
-   `PList manual page <http://developer.apple.com/documentation/Darwin/Reference/ManPages/man5/plist.5.html>`_
+   `PList manual page <https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man5/plist.5.html>`_
       Apple's documentation of the file format.
 
 
diff --git a/Doc/library/pprint.rst b/Doc/library/pprint.rst
index 447f8f7..c0589a3 100644
--- a/Doc/library/pprint.rst
+++ b/Doc/library/pprint.rst
@@ -211,7 +211,7 @@
 -------
 
 To demonstrate several uses of the :func:`pprint` function and its parameters,
-let's fetch information about a project from `PyPI <https://pypi.python.org>`_::
+let's fetch information about a project from `PyPI <https://pypi.python.org/pypi>`_::
 
    >>> import json
    >>> import pprint
diff --git a/Doc/library/select.rst b/Doc/library/select.rst
index 973a0cc..734e426 100644
--- a/Doc/library/select.rst
+++ b/Doc/library/select.rst
@@ -160,10 +160,7 @@
 .. _devpoll-objects:
 
 ``/dev/poll`` Polling Objects
-----------------------------------------------
-
-   http://developers.sun.com/solaris/articles/using_devpoll.html
-   http://developers.sun.com/solaris/articles/polling_efficient.html
+-----------------------------
 
 Solaris and derivatives have ``/dev/poll``. While :c:func:`select` is
 O(highest file descriptor) and :c:func:`poll` is O(number of file
diff --git a/Doc/library/statistics.rst b/Doc/library/statistics.rst
index 4e77838..0c9d88c 100644
--- a/Doc/library/statistics.rst
+++ b/Doc/library/statistics.rst
@@ -226,7 +226,7 @@
       * Calculating the `median <http://www.ualberta.ca/~opscan/median.html>`_.
 
       * The `SSMEDIAN
-        <https://projects.gnome.org/gnumeric/doc/gnumeric-function-SSMEDIAN.shtml>`_
+        <https://help.gnome.org/users/gnumeric/stable/gnumeric.html#gnumeric-function-SSMEDIAN>`_
         function in the Gnome Gnumeric spreadsheet, including `this discussion
         <https://mail.gnome.org/archives/gnumeric-list/2011-April/msg00018.html>`_.
 
diff --git a/Doc/library/unittest.mock-examples.rst b/Doc/library/unittest.mock-examples.rst
index 7963237..0a3cfb6 100644
--- a/Doc/library/unittest.mock-examples.rst
+++ b/Doc/library/unittest.mock-examples.rst
@@ -549,7 +549,7 @@
 
 An alternative way of dealing with mocking dates, or other builtin classes,
 is discussed in `this blog entry
-<http://williamjohnbert.com/2011/07/how-to-unit-testing-in-django-with-mocking-and-patching/>`_.
+<http://www.williamjohnbert.com/2011/07/how-to-unit-testing-in-django-with-mocking-and-patching/>`_.
 
 
 Mocking a Generator Method
@@ -1254,4 +1254,4 @@
 <https://pypi.python.org/pypi/PyHamcrest>`_ provides similar functionality,
 that may be useful here, in the form of its equality matcher
 (`hamcrest.library.integration.match_equality
-<http://pythonhosted.org/PyHamcrest/integration.html#hamcrest.library.integration.match_equality>`_).
+<http://pythonhosted.org/PyHamcrest/integration.html#hamcrest.library.integration.match_equality.match_equality>`_).
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index a4bed7a..c3ff494 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -67,7 +67,7 @@
    a GUI tool for test discovery and execution.  This is intended largely for ease of use
    for those new to unit testing.  For production environments it is
    recommended that tests be driven by a continuous integration system such as
-   `Buildbot <http://buildbot.net/trac>`_, `Jenkins <http://jenkins-ci.org>`_
+   `Buildbot <http://buildbot.net/>`_, `Jenkins <http://jenkins-ci.org/>`_
    or  `Hudson <http://hudson-ci.org/>`_.
 
 
diff --git a/Doc/license.rst b/Doc/license.rst
index c8d3b77..bbeacfc 100644
--- a/Doc/license.rst
+++ b/Doc/license.rst
@@ -27,7 +27,7 @@
 specifically to own Python-related Intellectual Property.  Zope Corporation is a
 sponsoring member of the PSF.
 
-All Python releases are Open Source (see http://www.opensource.org/ for the Open
+All Python releases are Open Source (see http://opensource.org/ for the Open
 Source Definition). Historically, most, but not all, Python releases have also
 been GPL-compatible; the table below summarizes the various releases.
 
diff --git a/Doc/reference/import.rst b/Doc/reference/import.rst
index 146f29e..e9b7e53 100644
--- a/Doc/reference/import.rst
+++ b/Doc/reference/import.rst
@@ -901,7 +901,7 @@
 
 The import machinery has evolved considerably since Python's early days.  The
 original `specification for packages
-<https://www.python.org/doc/essays/packages.html>`_ is still available to read,
+<http://legacy.python.org/doc/essays/packages.html>`_ is still available to read,
 although some details have changed since the writing of that document.
 
 The original specification for :data:`sys.meta_path` was :pep:`302`, with
diff --git a/Doc/reference/introduction.rst b/Doc/reference/introduction.rst
index 0ac5794..5633ae3 100644
--- a/Doc/reference/introduction.rst
+++ b/Doc/reference/introduction.rst
@@ -66,7 +66,7 @@
    An alternate Python for .NET.  Unlike Python.NET, this is a complete Python
    implementation that generates IL, and compiles Python code directly to .NET
    assemblies.  It was created by Jim Hugunin, the original creator of Jython.  For
-   more information, see `the IronPython website <http://www.ironpython.net/>`_.
+   more information, see `the IronPython website <http://ironpython.net/>`_.
 
 PyPy
    An implementation of Python written completely in Python. It supports several
diff --git a/Doc/tutorial/whatnow.rst b/Doc/tutorial/whatnow.rst
index a9ff6f4..6b03cb5 100644
--- a/Doc/tutorial/whatnow.rst
+++ b/Doc/tutorial/whatnow.rst
@@ -38,12 +38,12 @@
 
 * https://docs.python.org:  Fast access to Python's  documentation.
 
-* https://pypi.python.org: The Python Package Index, previously also nicknamed
+* https://pypi.python.org/pypi: The Python Package Index, previously also nicknamed
   the Cheese Shop, is an index of user-created Python modules that are available
   for download.  Once you begin releasing code, you can register it here so that
   others can find it.
 
-* http://aspn.activestate.com/ASPN/Python/Cookbook/: The Python Cookbook is a
+* http://code.activestate.com/recipes/langs/python/: The Python Cookbook is a
   sizable collection of code examples, larger modules, and useful scripts.
   Particularly notable contributions are collected in a book also titled Python
   Cookbook (O'Reilly & Associates, ISBN 0-596-00797-3.)
diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index bf4c1ab..3749e74 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -411,7 +411,7 @@
 
    Reserved for use by Jython_.
 
-.. _Jython: http://jython.org
+.. _Jython: http://www.jython.org/
 
 
 .. _using-on-envvars:
diff --git a/Doc/using/mac.rst b/Doc/using/mac.rst
index 9034b63..ede864d 100644
--- a/Doc/using/mac.rst
+++ b/Doc/using/mac.rst
@@ -64,7 +64,7 @@
 number of standard Unix command line editors, :program:`vim` and
 :program:`emacs` among them. If you want a more Mac-like editor,
 :program:`BBEdit` or :program:`TextWrangler` from Bare Bones Software (see
-http://www.barebones.com/products/bbedit/index.shtml) are good choices, as is
+http://www.barebones.com/products/bbedit/index.html) are good choices, as is
 :program:`TextMate` (see http://macromates.com/). Other editors include
 :program:`Gvim` (http://macvim.org) and :program:`Aquamacs`
 (http://aquamacs.org/).
@@ -116,7 +116,7 @@
 
 MacPython ships with the standard IDLE development environment. A good
 introduction to using IDLE can be found at
-http://hkn.eecs.berkeley.edu/~dyoo/python/idle_intro/index.html.
+https://hkn.eecs.berkeley.edu/~dyoo/python/idle_intro/index.html.
 
 
 .. _mac-package-manager:
@@ -130,7 +130,7 @@
   setup.py install``).
 
 * Many packages can also be installed via the :program:`setuptools` extension
-  or :program:`pip` wrapper, see http://www.pip-installer.org/.
+  or :program:`pip` wrapper, see https://pip.pypa.io/.
 
 
 GUI Programming on the Mac
@@ -140,7 +140,7 @@
 
 *PyObjC* is a Python binding to Apple's Objective-C/Cocoa framework, which is
 the foundation of most modern Mac development. Information on PyObjC is
-available from http://pyobjc.sourceforge.net.
+available from https://pythonhosted.org/pyobjc/.
 
 The standard Python GUI toolkit is :mod:`tkinter`, based on the cross-platform
 Tk toolkit (http://www.tcl.tk). An Aqua-native version of Tk is bundled with OS
diff --git a/Doc/using/unix.rst b/Doc/using/unix.rst
index 067f80a..5da1f23 100644
--- a/Doc/using/unix.rst
+++ b/Doc/using/unix.rst
@@ -67,7 +67,7 @@
 If you want to compile CPython yourself, first thing you should do is get the
 `source <https://www.python.org/download/source/>`_. You can download either the
 latest release's source or just grab a fresh `clone
-<https://docs.python.org/devguide/setup#getting-the-source-code>`_.  (If you want
+<https://docs.python.org/devguide/setup.html#getting-the-source-code>`_.  (If you want
 to contribute patches, you will need a clone.)
 
 The build process consists in the usual ::
@@ -145,5 +145,4 @@
 information, read: http://www.geany.org/
 
 Komodo edit is another extremely good IDE.  It also has support for a lot of
-languages. For more information, read:
-http://www.activestate.com/store/productdetail.aspx?prdGuid=20f4ed15-6684-4118-a78b-d37ff4058c5f
+languages. For more information, read http://komodoide.com/.
diff --git a/Doc/using/venv-create.inc b/Doc/using/venv-create.inc
index 26acf0b..ba1cdcc 100644
--- a/Doc/using/venv-create.inc
+++ b/Doc/using/venv-create.inc
@@ -14,7 +14,7 @@
 .. seealso::
 
    `Python Packaging User Guide: Creating and using virtual environments
-   <https://packaging.python.org/en/latest/tutorial.html#creating-and-using-virtual-environments>`__
+   <https://packaging.python.org/en/latest/installing.html#virtual-environments>`__
 
 .. highlight:: none
 
diff --git a/Doc/using/windows.rst b/Doc/using/windows.rst
index 10d4df3..93c67a7 100644
--- a/Doc/using/windows.rst
+++ b/Doc/using/windows.rst
@@ -29,9 +29,8 @@
 Check :pep:`11` for details on all unsupported platforms.
 
 * `Windows CE <http://pythonce.sourceforge.net/>`_ is still supported.
-* The `Cygwin <http://cygwin.com/>`_ installer offers to install the `Python
-  interpreter <http://cygwin.com/packages/python>`_ as well; it is located under
-  "Interpreters." (cf. `Cygwin package source
+* The `Cygwin <http://cygwin.com/>`_ installer offers to install the Python
+  interpreter as well (cf. `Cygwin package source
   <ftp://ftp.uni-erlangen.de/pub/pc/gnuwin32/cygwin/mirrors/cygnus/
   release/python>`_, `Maintainer releases
   <http://www.tishler.net/jason/software/python/>`_)
@@ -45,9 +44,9 @@
       "7 Minutes to "Hello World!""
       by Richard Dooling, 2006
 
-   `Installing on Windows <http://diveintopython.net/installing_python/windows.html>`_
+   `Installing on Windows <http://www.diveintopython.net/installing_python/windows.html>`_
       in "`Dive into Python: Python from novice to pro
-      <http://diveintopython.net/index.html>`_"
+      <http://www.diveintopython.net/>`_"
       by Mark Pilgrim, 2004,
       ISBN 1-59059-356-1
 
@@ -67,7 +66,7 @@
 `ActivePython <http://www.activestate.com/activepython/>`_
     Installer with multi-platform compatibility, documentation, PyWin32
 
-`Enthought Python Distribution <http://www.enthought.com/products/epd.php>`_
+`Enthought Python Distribution <https://www.enthought.com/products/epd/>`_
     Popular modules (such as PyWin32) with their respective documentation, tool
     suite for building extensible Python applications
 
@@ -555,7 +554,7 @@
 If you want to compile CPython yourself, first thing you should do is get the
 `source <https://www.python.org/download/source/>`_. You can download either the
 latest release's source or just grab a fresh `checkout
-<https://docs.python.org/devguide/setup#checking-out-the-code>`_.
+<https://docs.python.org/devguide/setup.html#checking-out-the-code>`_.
 
 The source tree contains a build solution and project files for Microsoft
 Visual C++, which is the compiler used to build the official Python releases.