Scrupp is a cross-platform 2D engine which uses SDL and OpenGL for visualization. It is controlled by external Lua scripts. The core supports various image, sound, music and font formats. The hard work is done by plugins written in Lua.
Lunar aims to be a cross-platform engine geared towards developing two-dimensional video games. In addition to Lua-based scripting, planned features include support for interchangeable graphics, image and audio libraries, and a fully-featured editor.