Cross-platform Devkits

PyGame: [submitted by cr88192] "could always try "PyGame"... some people swear by it (... or swear at it ...). (not actually used it myself, no interest)... it is for gamedev, though whether or not it is "good" is uncertain. but I am not really a big fan of Python personally, so I could be a bit biased."

Haxe: [submitted by TheGoodIdeaCo]: Haxe is an open source toolkit based on a modern, high level, strictly typed programming language, a cross-compiler, a complete cross-platform standard library and ways to access each platform's native capabilities.