Mh, that's not very specific..
Still, you could check out pretty much everything by AC/DC, Led Zeppelin and Black Sabbath. Most of their riffs are fairly doable with a bit of practise, and they sound good too.
Current gear:
Carvin CT6M
TC Electronics Dark Matter distortion
Harley Benton 2x12, with Celestion V30s
Laney Ironheart 60w tube amp
Free - Alright now Intro+Solo,A good example of simplicity.LordPino's got good recommendations there.
I went to the zoo the other day, there was only one dog in it, it was a shitzu.

He who laughs last thinks slowest