The first major X release for over 10 years, X11R7, has finally adopted a modular approach. X11R6.9, which uses the same codebase, is the last monolithic release for existing systems.

Want to study math the easy way? This award-winning teaching tool lets you master Geo even if you aren’t Giotto.

If you want to become an expert in world geography, why not get a little help from the CIA?

Blender not only generates realistic single frames; it is also capable of capturing the natural movements of people and animals. We’ll introduce you to some of Blender’s animation features.

If you want to send your friends birthday greetings or a personalized picture postcard, KreetingKard can help.

If you like astronomy but you don’t like sitting outside on cold nights, try stargazing from a virtual planetarium.

pstoedit lets you convert Postscript and PDF files to vector-based image formats.