SDL. It is solidly cross-platform (supports Haiku, which makes me smile, as well as Linux, Win, iOS, Android and so on and so on) and zLib licensed (pay nothing

SDL. It is solidly cross-platform (supports Haiku, which makes me smile, as well as Linux, Win, iOS, Android and so on and so on) and zLib licensed (pay nothing; use it, distribute it, static link, dynamic link, whatever you want - the zLib licence fits on a postcard). Here's someone talking about it at a steam dev day: https://www.youtube.com/watch?v=MeMPCSqQ-34&list=PLckFgM6dUP2hc4iy-IdKFtqR9TeZWMPjm https://www.youtube.com/watch?v=MeMPCSqQ-34&list=PLckFgM6dUP...