|Blender - Open Source 3D
Blender is an open source 3D package with all the standard functions and some rather nifty and very un-standard ones. It started out as an in-house tool at a Dutch animation company and grew a life of its own.
I take a certain pride, but mainly joy, in the fact that I was one of the surprisingly large group of people who decided to say adieu to 50 dollars in order to ensure Blender's survival and transformation into one of the most interesting and successful open source projects on the planet.
Since then Blender evolves steadily in all the right directions, and all the things that were right from the start remain.