What are the most interesting projects surrounding python?

Question

There are many neat projects around that are extending the usefulness of python inside and outside the core language and standard library. Some that come to mind are:

• pypy
• stackless
• twisted
• unladen swallow
• web frameworks
• numpy
• function annotations
• other interesting ideas

What are some of the projects that get you excited, on and off this list?

Answer 1

My favorites:

• Full-featured web frameworks like Django - making basic web development really easy.
• PyQt - binding the full power of the Qt framework to Python
• Pygame - easy and fun game development
• matplotlib - publication-quality scientific plots for any purpose

Answer 2

Reportlab - Programatic creation of PDFs.

I second all of Eli's suggestions, all realy excellent stuff especially PyQt and PySide.

Answer 3

Sage: "Sage is a free open-source mathematics software system licensed under the GPL. It combines the power of many existing open-source packages into a common Python-based interface."

Answer 4

i like zope and plone very much.

Answer 5

PLY - Python Lex-Yacc

It (ab)uses Python's docstrings to allow you to embed BNF grammar files directly into the code.

Answer 6

Pyjamas (PyJS) - Unified web and GUI framework with all components being done in native python (no more annoying JS).