Mac - Perian
Perian - enables OS X applications that uses
QuickTime to be able to play other media types, such as DivX,
XviD, mpeg4, AC3 audio, etc. A must download for anyone watching
video on their Mac. Perian is a free, open source QuickTime
component that adds native support for many popular video
formats.
Perian features:
• AVI, FLV, and MKV file formats
• MS-MPEG4 v1 & v2, DivX
• AVI support for: AAC, AC3 Audio, H.264, MPEG4, and VBR MP3
• Subtitle support for SSA and SRT
