Here's a list of what I've used at one time or another. I put a star (*) by the ones I still use. As you can tell, I like to experiment.

Hoppes #9
Hoppes copper solvent
Shooter's Choice *
Kroil *
Break Free CLP *
Butch's Bore Shine
Butch's gun oil *
Bore Tech Bench Rest blend
Bore Tech Rim Fire blend *
TM Solution * (sold onlyby SinclairInt'l as far as I know)
MPro-7 *
JB Paste *
Sweets 7.62
Barnes CR-10 *
WipeOut *
Birchwood Casey Gun Scrubber *

I think there have been some others, but I can't remember them offhand. One I really want to try is Hunter's Exteme Copper Melt. The company's had some problems lately and supplies are almost nonexistent, but I think they're getting back on they feet now (demand far outstripped their ability to produce it I believe, which caused some major problems for them) and I want to try some when I can find it. They talk very highly of it over at longrangehunting.com.