Indie Game Sites

itch.io: an idnie game shop for any size of project, from 48 hour production to full-sized. Watch the price tags, but feel free to try demos.
GameJolt: same concept as itch.io, different selection of games.
Scratch: a block-based coding system used mainly by kids to learn how to make games and apps. It's got some hidden gems in there.
Construct: a game engine that's been used to make a few hits. I've made a guide to help you find the good stuff.