Longford
A cross platform Lua based game engine
...It has the following features:
+ Sprite hierarchy. Sprites drawn in order according to a display "tree" allowing grouping of complex drawings.
+ Frame update, keypress and (multi)touch events which propagate through the display tree.
+ Creation of Sprites including polygon Shapes and rectangular Bitmaps with transparency (import as PNG, JPG, GIF, BMP, TGA)
+ Creation of Textfields based on bitmap fonts.
+ Translation, rotation and scaling of sprites.
+ Box2D physics engine.
+ Play sound effects using WAV files and stream music using OGG files...