The RealPlayer plays all major media formats including RealVideo, RealAudio, Windows Media and Quicktime. This makes it easier for end users to decide on the media they want to access, not the format or software. We take universality a step further by providing RealPlayers for Windows, Macintosh, Linux, Unix, mobile phones, portable devices, set top boxes, DVD players and gaming consoles. ... more

K-Lite Mega Codec Pack combines the contents of three codec packs: K-Lite Codec Pack Full, QuickTime Alternative, and Real Alternative. It also includes some extra features: BSplayer and ffdshow.
 
Contents of version 3.8.0:

Player:
Media Player Classic [version 6.4.9.1 rev. 40] ffdshow: ffdshow [revision 1872] ffdshow VFW interface extra plugins DirectShow video decoding filters: XviD [version 1.2.0-dev build 2008-01-10] DivX [version 6.8.0.0] On2 VP6 [version 6.4.2.0] On2 VP7 [version 7.0.10.0] MPEG-2 (Cyberlink) [version 8.1.0.1317] MPEG-2 (Gabest) [version 1.0.0. ... more