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.