- FOURCC: ???
- Company: Xiph
- Samples: http://samples.mplayerhq.hu/V-codecs/Theora/
- Patents: On2 claims to hold several (undisclosed) patents, but has granted an irrevocable, royalty-free, transferrable license for any use, distribution, or sale of their VP3 software, or any derivative thereof (including Theora). It is unclear which patents actually apply.
- Website: http://theora.org
- Theora at XiphWiki