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Free-Codecs.com : Download audio codecs, video codecs, codec packs and tools, FREE : FFDShow MPEG-4 Video Decoder, XP Codec Pack, Real Alternative, DivX Free, XviD Codec, AC3 Filter, VideoLAN, LAME MP3 Encoder

VLC: Official site - Free multimedia solutions for all OS!

WinX DVD ripper & HD video converter, devotes the best and easiest dvd to avi, dvd to mp4, and convert AVCHD M2TS MKV to AVI MP4 DVD.

Free software downloads to play & stream DivX (AVI) & DivX Plus HD (MKV) video. Find devices to play DivX video and Hollywood movies in DivX format.

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News, notes and ramblings from the Mozilla project

MainConcept is a worldwide leading provider of high-quality codec technology supporting industry standards such as H.264/AVC, MPEG-2, MPEG-4, DVCPRO HD, JPEG2000, VC-1, and HE-AAC.

H.264 / AVC tutorials, white papers, consulting

World leading imaging SDK for color, black and white, medical, DICOM, PACS, Vector and Multimedia imaging technologies.

ZDNet delivers the latest technology news, comments and product reviews focusing on IT hardware, software, mobile, security, and other special topics

The CCCP: Combined Community Codec Pack is a codec pack specifically built for playing videos (including mkv).

Linux.com - For the community, by the community, Linux.com is the central source for Linux information, software, documentation, how-tos and answers across the server, desktop/netbook, mobile, and embedded areas.