The ones I saw/played:
Code Hero: A game that teaches you how to code. I love the idea; the game is still in development.
3D VVVVVV: Still difficult as heck.
At A Distance: I didn't get a chance to play it, and I couldn't really figure out what was going on by watching. Lots of abstract shapes and two players having to work together to do... something.
No Time to Explain: Kind of a silly, cartoony platformer. I admit, I was kind of put off by the art style.
Catapult for Hire: Looked like a pretty straightforward 3D physics puzzler (but maybe everyone was playing tutorial levels?). I think it gets cooler later on with story and adventure elements.
Dragon Fantasy: JRPG in a retro style for iOS, kinda like Cthulu Saves the World.
A Valley Without Wind: A metroid-like with procedurally generated levels.
Retro/Grade: A rhythm shooter compatible with guitar hero guitars where you can go back in time.
All the others:
Snapshot by RetroAffect: upcoming game about taking photos which looks cute.
Octodad: 3rd-person adventure about being a dad? I'm downloading it now.
Here Comes Launchman: retro-styled platformer with things you can stick to and throw, maybe?
Airmech by Carbon games: some kind of 3rd person shoot 'em up
Influence: another one of these zen games where you build up your little sphere to consume all other things.
Incredibots: A machine building game.
Retro City Rampage: retro-styled action parody game.
Frozen Synapse: A tactical game that has been pretty popular and was featured in the last indie bundle.
Zombie Grinder: I think the title sums it up.
Jesus vs. Dinosaurs: Make cars with tetris pieces, then run them together to see who wins. Oh and the playable characters are Darwin and God. I can't tell if I should be offended or not.
If you had a game at Minecon, leave a comment and I can add it to the list. Also, if you'd like me to review your game, feel free to e-mail me.
