Cataclysm is a zombie apokalypse roguelike and looks pretty interesting. They just launched a kickstarter campaign, so that one of them can work full time on the project. I've never seen and played this game before, so I don't know if it's worth it. I'll wait for a review on the Freegamer blog.
One of their goals is support for real graphics instead of ASCII, if you're one of the people who get eye cancer from ASCII graphics and want to back the project just for that reason.