LambdaNative is an open-source (BSD licensed) cross-platform development environment written in Scheme (Gambit-C), supporting Android, iOS, OS X, Linux, Windows and OpenBSD.
If you use the LambdaNative framework for your own work, please reference this ICFP paper. A slideshow describing the LambdaNative framework is available here.
uSquish, the simple example game included in the LambdaNative repository,
is available as a free download on the Apple and Google stores: uSquish for iOS and uSquish for Android
Instructions for getting started and API documentation can be found in the wiki: LambdaNative Documentation and Support