VP3

VP3 is a video codec originally developed by On2 Technologies, which donated the codec to Xiph.org Foundation in summer 2002 as an open source project. On2 still has further developer propietary version of VP3 among its products, currently called as VP5.

VP3 codec is now part of Xiph.org Foundation's Ogg Theora project, which aims to integrate Ogg Vorbis audio codec and VP3 into a fully integrated multimedia platform that would compete against likes of MPEG-4.