Just noticed that Starcraft II is now Free to Play. There are probably parts that needs to be paid, but it looks like you can enjoy much of the game without paying a single cent now.
Used to play the games back in the day, so this is a little trip down memory lane for me. Enjoy !
Ed: Apparently it's been FTP for a while now. However there wasn't a previous OZB post on this. So hopefully this will be useful for those who weren't aware like me :)