.MP4 file extension
This is the list of programs to work with .MP4 extension
3gp and mp4 Player for Windows for free.
This simple software lets you play audio and video files.
Supports all mobile phone video formats including 3GP, 3G2 (3GPP2) and MPEG-4.
Total Video Converter is an all-in-one shareware video converter for Windows.
Media Player Classic - Home Cinema is a free audio and video player for Windows.
MySQL Tools for
A comprehensive media player with a number of bugs.