TheoraSoftwarePlayers
Multi-platform
- VLC Media Player: Open Source media player and streaming server that support virtually every video and audio format
- Xiph Plugins for Real Player/Producer
- Quicktime components for Quicktime 6 and Quicktime 7 – QuickTime and Macintosh OS X plug-ins
Windows
- DirectShow filter: Adds support for Ogg Vorbis, Ogg Speex, Ogg Theora, Ogg FLAC, and native FLAC to any DirectShow-compliant player such as Windows Media Player and BSPlayer
Linux/BSD
- Helix Player
- Totem - can user either xine or Gstreamer as backend
- Xine: Video player with long list of supported formats
- Mplayer: Open Source video player