These are off the top of my head and I may add more tomorrow. There are actually a few games on this list that I admire, but they are not for me. One system of games may have been interesting, but the formatting was too much of a chore to read through. Many of the games were just plain terrible, imo with some being returned to the local game store within 24hrs. Then, there were a few that either just did not did not impress me or were just not "my cup of tea".
d6 Adventure, Fantasy, Space (WEG)
The Adventures of Indiana Jones (TSR)
Alternity
DC Universe RPG (WEG)
Dungeons & Dragons 4e (TSR)
Dungeon World
Enforcers (21st Century Games)
Fate (Evil Hat)
Fiasco
Gamma World: 3e, 4e, 5e .6e. 7e
Heroes & Heroines (Excel Marketing)
Heroes Unlimited: Revised (Palladium Games)
Marvel Universe RPG (QED/Marvel)
Mercenaries, Spies, & Private Eyes (Flying Buffalo)
Pathfinder (Paizo)
SFX Roleplaying (Joshua Macy)
Tunnels & Trolls (Flying Buffalo)
Valiant Universe (Catalyst Games)
Villains & Vigilantes 1e