Arcan is a 2D/3D multimedia engine controlled by scripts using a rather high-level LUA API. The more advanced features include video decoding, encoding and hijacking other programs. It runs on FreeBSD, Linux, Windows and even OSX if you touch it just right.
This is the first LUA directed announcement for a project that has been in the works for a long time, that is reaching maturity enough to, hopefully, be of interest and benefit to others in the LUA community.
It is a rather high-level engine for doing multimedia experiments, game development, visualizations etc. I've personally used it for computer vision, emulation and reverse engineering experiments for a long time.