Do you play them? If you find some cool ones that grab your attention, please post them. Here are a few I liked.
Orisinal - A couple of relaxing games, to get you in a Zen like state of mind.
Desktop Tower Defense - A cool strategy game.
Samorost - The most SURREAL 'point and click' adventure game that I have ever played.
WarcraftTD - An addicting strategy game placed in the Wow world.
Shift - A very original logical/platform game.
Spin the black circle - If this game doesn't make your head spin, then nothing will.
Flash Trek - A Star Trek based arcade/strategy game.(Star Trek fans will love it)
Lego Indiana Jones - Everybody loves good ol' Indie, especially the lego version of him, right?
Quest for the Crown - This is an oldie but a goodie. Probably the largest development team for a flash game.
(A must see)