Recently I've been working on a new roguelike, titled Pseudo.
Similar to Ahungry Tactics, the game is free and open source under the AGPLv3.
You can find the source code here on Github.
Assuming it is running and my VPS hasn't crashed it (hey, its still alpha/early development) you can play a live demo on my site at:
While the core of the game is becoming stable and usable, I have some work to do regarding the animation - a lot of it right now is recycled images from tactics - I think I'll end up using a traditional 2d animation style for the game (a super rough sketch of what I'm planning can be seen below):