K-Lite Mega. Complete and famous package of audio and video codecs. (Includes media player)
Real Alternative allows you to play RealMedia files without installation of RealPlayer.
VLC Media Player is the most popular video & movie player in the world. Supports various codecs and displays subtitles.
Enjoy listening to music without any hassle. Brings all essential audio and video codecs and supports multiple file formats.
Play your files in FLV format with a simple, lightweight application.