VLC

Media Player

VLC is a free and open supply cross-platform multimedia player and framework that performs most multimedia files as well as DVDs, Audio CDs, VCDs, and a number of streaming protocols.

Features
Simple, quickly and effective media player. 

Plays everything: Files, Discs, Webcams, Devices and Streams. 

Plays most codecs with no codec packs needed:

MPEG-2, DivX, H.264, MKV, WebM, WMV, MP3... 

Runs on all platforms: Windows, Linux, Mac OS X, Unix... 

Completely Free, no spyware, no ads and no person tracking. 

Can do media conversion and streaming. two