I found this great site that offers all Led Zeppelin and Pink Floyd tabs. It might have other bands, but I havn't really looked into it too much. The tabs are pretty much 95% correct.

Led Zeppelin= Guitarnoise.com/led_zeppelin/
Pink Floyd= Guitarnoise.com/pink_floyd/

Search for any other bands by doing Guitarnoise.com/
then the name of the band with an underscore instead of spaces.