The Open Toolkit library provides advanced, cross-platform Mono/.Net bindings to OpenGL, OpenGL|ES, OpenAL and OpenCL. It can be used standalone, in the spirit of SDL or GLFW, or integrated into GUI applications (GTK#, Windows.Forms, WPF).

Homepage: http://www.opentk.com
Bug tracker: http://www.opentk.com/issues
Forums: http://www.opentk.com/forum