TUP-B-PENG is Tux's Pixel-by-Pixel Engine, mostly for pixel-by-pixel movement rpg games. It can be used for other games too, but is less simple. In very early prealpha 0.01. Will post links when it reaches a usable state (probably later this year, maybe version 0.1). It can also be called STUP-B-PENG, little bit of trouble deciding.
Heres a link to the github repo:
http://github.com/chrowle/crackerbarrel