GeoGebra is an interactive geometry, algebra, statistics and calculus application, intended for learning and teaching mathematics and science from primary sch…

Pure Data (Pd) is a visual programming language for creating interactive computer music and multimedia works.

Madsonic is a web-based media library and media streamer with jukebox functionality.

Processing is a flexible software sketchbook and a language for learning how to code within the context of the visual arts.

openFrameworks is an open source toolkit designed for "creative coding". OpenFrameworks is written in C++ and built on top of OpenGL.