- theora: reference encoder/decoder library with MMX optimizations for x86 and x86_64: svn, official releases.
- theora-oil: branch with liboil calls: svn [UNMANTEINED].
- theora-exp: experimental encoder/decoder library, supporting the whole spec and having also MMX optimizations for decoding: svn.
- Theora Hardware: List of hardware-players supporting Ogg Theora
- TheoraSoftwarePlayers: List of media players that can play Ogg Theora
- TheoraSoftwareEncoders: List of software that can encode to Ogg Theora
- TheoraDecoders: List of decoder implementations
- TheoraEncoders: List of encoder implementations
- List of Theora videos: Get some files to see what the codec's like
- Games that use Theora: List of known games that use Theora
- TheoraTestsuite: Different samples to test player compliance