Adventurer Conqueror King System
by: Alexander Macris
Astonishing Swordsmen & Sorcerers of Hyperborea
by: Jeffrey Talanian
by: Greg Gillespie
by: Jeff Dee
by: Joseph Goodman
With the exception of Cavemaster (which I never heard of before) I own the list, and these are all strong choices. Four out of five are game systems and the fifth is probably the strongest megadungeon released in 2012 (yes, I'm talking about you Barrowmaze.
You can read the original thread at the NTRPGCon forums here.