Best free lightweight media player for windows 7

Hi

I am now looking for best free and light weight media player and media organizer for windows 7 . If we can get open source then will be good. I want to use it alternative of windows media player. It should play all popular format and above all should be light and fast.

Any suggestions friends ?

There is GOM player and also you can try SMPlayer, both are good. And not to forgot , VLC player. Also Media player classic is good choice too.