diff --git a/Doc/install/index.rst b/Doc/install/index.rst
index ad939ab..3b6ccba 100644
--- a/Doc/install/index.rst
+++ b/Doc/install/index.rst
@@ -1009,7 +1009,7 @@
 
 .. 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.
 
@@ -1081,7 +1081,7 @@
 
 .. 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.
 
 
@@ -1090,7 +1090,7 @@
 .. [#] 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/library/cookielib.rst b/Doc/library/cookielib.rst
index b1baef1..e559f82 100644
--- a/Doc/library/cookielib.rst
+++ b/Doc/library/cookielib.rst
@@ -122,7 +122,7 @@
       HTTP cookie classes, principally useful for server-side code.  The
       :mod:`cookielib` and :mod:`Cookie` 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:`cookielib`) only bears a passing resemblance to
diff --git a/Doc/library/difflib.rst b/Doc/library/difflib.rst
index 878d8e6..89a457c 100644
--- a/Doc/library/difflib.rst
+++ b/Doc/library/difflib.rst
@@ -331,9 +331,9 @@
 
 .. 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/gettext.rst b/Doc/library/gettext.rst
index 9b4eb0c..f885afb 100644
--- a/Doc/library/gettext.rst
+++ b/Doc/library/gettext.rst
@@ -756,8 +756,8 @@
 .. [#] See the footnote for :func:`bindtextdomain` above.
 
 .. [#] François Pinard has written a program called :program:`xpot` which does a
-   similar job.  It is available as part of his `po-utils package
-   <http://po-utils.progiciels-bpi.ca/>`_.
+   similar job.  It is available as part of his
+   `po-utils package <https://github.com/pinard/po-utils>`__.
 
 .. [#] :program:`msgfmt.py` is binary compatible with GNU :program:`msgfmt` except that
    it provides a simpler, all-Python implementation.  With this and
diff --git a/Doc/library/mailbox.rst b/Doc/library/mailbox.rst
index 94fde14..3154aa4 100644
--- a/Doc/library/mailbox.rst
+++ b/Doc/library/mailbox.rst
@@ -474,7 +474,7 @@
    `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 17d71ab..4aca842 100644
--- a/Doc/library/msilib.rst
+++ b/Doc/library/msilib.rst
@@ -123,9 +123,9 @@
 
 .. 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:
 
@@ -154,9 +154,9 @@
 
 .. 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:
 
@@ -202,11 +202,11 @@
 
 .. 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:
 
@@ -246,10 +246,10 @@
 
 .. 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:
 
@@ -300,11 +300,11 @@
 
 .. 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:
 
@@ -396,10 +396,10 @@
 
 .. 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:
 
@@ -424,7 +424,7 @@
 
 .. 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:
 
@@ -519,13 +519,13 @@
 
 .. 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/plistlib.rst b/Doc/library/plistlib.rst
index c6930c6..b8aa1e2 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/license.rst b/Doc/license.rst
index 3663a88..f09f96c 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/introduction.rst b/Doc/reference/introduction.rst
index d75d22b..a84d8e8 100644
--- a/Doc/reference/introduction.rst
+++ b/Doc/reference/introduction.rst
@@ -65,7 +65,7 @@
    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 1ff4ae3..be7a5c1 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 842b266..b657f3f 100644
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -410,7 +410,7 @@
 
    Reserved for use by Jython_.
 
-.. _Jython: http://jython.org
+.. _Jython: http://www.jython.org/
 
 .. cmdoption:: -U
 
diff --git a/Doc/using/mac.rst b/Doc/using/mac.rst
index 3a6b797..9f47fb4 100644
--- a/Doc/using/mac.rst
+++ b/Doc/using/mac.rst
@@ -71,7 +71,7 @@
 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/).
@@ -123,7 +123,7 @@
 
 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:
@@ -137,7 +137,7 @@
   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
@@ -147,7 +147,7 @@
 
 *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 010513b..b3e6ced 100644
--- a/Doc/using/unix.rst
+++ b/Doc/using/unix.rst
@@ -65,7 +65,7 @@
 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 ::
@@ -147,5 +147,4 @@
 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/windows.rst b/Doc/using/windows.rst
index 4911288..03750f5 100644
--- a/Doc/using/windows.rst
+++ b/Doc/using/windows.rst
@@ -31,9 +31,8 @@
   following releases), this support was dropped and new releases are just
   expected to work on the Windows NT family.
 * `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/>`_)
@@ -47,9 +46,9 @@
       "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
 
@@ -69,7 +68,7 @@
 `ActivePython <http://www.activestate.com/Products/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
 
@@ -294,7 +293,7 @@
 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>`_.
 
 For Microsoft Visual C++, which is the compiler with which official Python
 releases are built, the source tree contains solutions/project files.  View the