MPlayer OSX is a Cocoa frontend for The MPlayer Project cross platform media player.

About The MPlayer Project

MPlayer is a multimedia player for Linux (runs on many other platforms and CPU architectures, see the documentation). It plays most MPEG/VOB, AVI, ASF/WMA/WMV, RM, QT/MOV/MP4, OGG/OGM, MKV, VIVO, FLI, NuppelVideo, yuv4mpeg, FILM and RoQ files, supported by many native and binary codecs. You can watch VideoCD, SVCD, DVD, 3ivx and DivX 3/4/5 movies, too.
MPlayer is fast, as most of time-critical parts are optimized for Intel/AMD (MMX/MMX2/SSE/SSE2/3DNow!/3DNowEx), PowerPC G4 (Altivec), SPARC (VIS), ARM PDAs and the Sony Playstation 2.

About MPlayer OSX

MPlayer OSX was originally developed by Klokan Petr Pridal, who was also the founder of the project, and Jan Devera. Now, the Project is being actively developed by Nicolas Plourde and a small team of volunteers. It has undergone some changes in the user interface, gained on speed, and is aiming to be the best movie player for the mac.