A couple, sticking to just youtube...
Guttermouth - Whiskey
http://www.youtube.com/watch?v=5qEXQFA01cY
Long Beach Dub All Stars - Trailer Ras
http://www.youtube.com/watch?v=_HYNfWn32MA
Henry Rollins - Liar
http://www.youtube.com/watch?v=ZAMWlw0ev_c
Atmosphere - Trying to Find a Balance
http://www.youtube.com/watch?v=igNDd2G7Y0A
edit: Forgot my favourite song right now; Brother Ali - Uncle Sam Goddam
http://www.youtube.com/watch?v=OO18F4aKGzQ