ISO 8601 date/time/duration parser and formater

https://pypi.org/project/isodate/

Python interface for XML parser library for GNOME

http://xmlsoft.org/

Python-based audio metadata tag reader and writer

https://github.com/quodlibet/mutagen

The Numeric Extension to Python

http://numeric.scipy.org/

Python library for OAuth version 1.0

https://github.com/joestump/python-oauth2

Python SSH2 protocol library

https://www.paramiko.org/

General parsing module for Python

https://pypi.python.org/pypi/pyparsing

Python Cryptography Toolkit

https://pycrypto.org

Syntax highlighter written in Python

https://pygments.org/

World Timezone Definitions for Python

https://pythonhosted.org/pytz/

Python library for RDF manipulation

https://pypi.org/project/rdflib/

Python packages installer

https://pypi.org/project/setuptools/

Download, build, install, upgrade, and uninstall Python packages

https://pypi.python.org/pypi/setuptools

Simple, fast, extensible JSON encoder/decoder

https://github.com/simplejson/simplejson

SPARQL endpoint interface to Python

https://sparqlwrapper.readthedocs.io/en/stable/

Python documentation generator

https://www.sphinx-doc.org/

Standard Python binding to the SQLite3 library

Sqlite-backed dictionary

https://github.com/YelpArchive/sqlite3dbm

ANSII Color formatting for output in terminal

https://pypi.org/project/termcolor/

Python wrapper around the Twitter API

http://code.google.com/p/python-twitter/

Python API and command-line toolset for Twitter

https://github.com/sixohsix/twitter

Python 2 library to access freedesktop.org standards

http://freedesktop.org/Software/pyxdg

PyXML: Python XML library enhancements

http://pyxml.sourceforge.net/

Python YAML parser

https://pyyaml.org/

An extensible benchmark suite for Python

http://www.lemburg.com/python/

"meta-port" for the default version of Python interpreter

https://www.python.org/

"meta-port" for version 2 of the Python interpreter

https://www.python.org/

Interpreted object-oriented programming language

https://www.python.org/

Collaborative, networked system to detect and block spam

https://github.com/SpamExperts/pyzor

Quick Database Manager

http://fallabs.com/qdbm/

Qhull computes convex hulls, Delaunay triangulations, and halfspaces

http://www.qhull.org

The build utility of the Qt project

http://www.trolltech.com/products/qt/index.html

A command line program to query game servers on the net

http://www.qstat.org/

Qt Documentation

http://qt.nokia.com/products/qt/index.html

Quake III Arena data files

http://www.idsoftware.com/games/quake/quake3-arena/

Test performance of storage devices

Randr extension headers

https://www.freedesktop.org/wiki/Software/xlibs/

RDF Parser Toolkit for Redland

http://librdf.org/raptor/

RDF Parser Toolkit for Redland

https://librdf.org/raptor/

OMF help system based on the Freedesktop specification

https://rarian.freedesktop.org/

Simple window manager with no fat library dependencies

https://www.nongnu.org/ratpoison/

Distributed, collaborative, spam detection and filtering network

http://razor.sourceforge.net/

Unix incarnation of the plan9 shell

http://tobold.org/article/rc

Checks rc scripts for style and common errors

https://github.com/crees/rclint

Version control system (as was in FreeBSD prior to removal)

http://www.gnu.org/software/rcs/

RDP client for Windows NT/2000/2003 Terminal Server

http://www.rdesktop.org/

Lexer generator for C, C++ and Go with a focus on generating fast code

https://re2c.org/

Library for editing command lines as they are typed

https://tiswww.case.edu/php/chet/readline/rltop.html

Converts files between character sets and usages

http://www.gnu.org/software/recode/recode.html

RECORD extension headers

http://www.freedesktop.org/wiki/Software/xlibs