Pogolyn is a cross-platform 3D graphics engine intended to be easy-to-use and high performance, which also supports the features for game development. Pogolyn has been renamed to Catcake and moved to http://code.google.com/p/catcake/.
Monster is a scripting language designed for game development. It is object oriented, type safe, bytecode-compiled, easily merged into existing engines and especially designed to facilitate user-generated scripts. Homepage: http://monsterscript.net