NoobyProtect : seems to be top of the food-chain right now.
Enigma Protector : is still very solid.
Winlicense/Themdia : is still very solid.
Asprotect/SKE : I don't see much anymore, that may just be a fluke.
Armadillo : Chad & Nick need to come up with some new tricks, outside of their ECDSA level 10 keys, Armadillo is pretty much rapped at will anymore.
SVKP : I believe is no longer being developed.
Obsidium : I haven't seen nor heard about it lately, though according to their website they support Windows 7. So I can only assume it is still alive.
Activemark : Still alive and kicking, though ARTeam seems to have their number
SafeDisc : Now owned by Trymedia (Maker of Activemark) is also still alive and kicking.
ExeCryptor : Hasn't been updated in awhile...(Dead?)
Thats all I can think of...