Almost any Rage Against the Machine cover is great, they really add their own feel/style to the songs they cover. Here is a list of all the songs they have covered/worked on with other groups that are worth mentioning if you wanted to know.
Microphone Fiend by Eric B. & Rakim
Pistol Grip Pump by Volume 10
Kick Out the Jams by MC5
Renegades of Funk by Afrika Bambaataa and Soul Sonic Force
Beautiful World by Devo
I'm Housin' by EPMD
In My Eyes by Minor Threat
How I Could Just Kill A Man by Cypress Hill
The Ghost of Tom Joad by Bruce Springsteen
Down on the Street by The Stooges
Street Fighting Man by The Rolling Stones
Maggie's Farm by Bob Dylan
All of the ones above are from their album Renegades
Intro (Black Steel In The Hour Of Chaos) (Live) with Chuck D.
Hadda Be Playing On The Jukebox (Live) originally a poem by Allen Ginsberg
Fuck tha Police (Live) by N.W.A.
Clampdown (Live) by The Clash
The Sound Of Da Police (Live) by KRS-One
And these few I guess you could include if you want to stretch things
Bombs Over Baghdad with Outkast
Wu-Tang Clan Aint Nothing ta Fuck With with Wu-Tang Clan
Snoop Bounce with Snoop Dogg
But yea anyways RATM had some great covers that are worth listening to.