Hip, cool, and jolly nice free roguelike Red Rogue is now available for your dungeon-crawling delight. It's been making waves in certain indie circles for a while, if you've had your ear to the ground, but is only now finished in all its open-source glory. Go, play.
Creator Aaron Steed describes it as an "unofficial sequel" to the classic Rogue. "It wasn't originally, I just wanted to make my own role-playing-game and put all the sorts of things I like in there. Especially if everyone else hated them," he said. "Then the minion stopped being an optional companion and I started to think about the relationship between the heroine and her side-kick..."
It's really nice. You should play it. Then donate a little money, out the goodness of your heart.