An intuitive molecular editor and visualization tool
Avogadro is an advanced molecular editor designed for cross-platform use in computational chemistry, molecular modeling, bioinformatics, materials science and related areas. It offers a flexible rendering framework and a powerful plugin architecture.
SaGE (SaneT Game Engine) is a Game Engine, built on top of the largely successful Open Source Irrlicht graphic engine, along with irrKlang for audio and IrrNewt for physics. Developed for the developers, but available to general public.
The VerticalPark efficiently adds ample greenery, plaza, water, sun, shade, rest, and exercise to an urban setting. This open source OS X visualization demonstrates both good design and the revelation that programmatic art needn't be programmer art.