AppTestStudio (ATS) is an automated development environment, you can build, test, and automate Windows applications and android emulators. Quickly and interactively create automated actions by building Events either with pixel color matching, or using OpenCV image matching. Then attach actions to the events such as clicking or dragging. The multi processing (multiple scripts at the same time) was removed now only a single script can be run at one time. It was too confusing for some users...
SDL.NET is a set of object-oriented .NET bindings for the SDL gaming library and provides high-level access to audio, keyboard, mouse, joystick, TTF fonts, various image formats, sound mixing, MPEG-1, and 2D video framebuffer.
BooGame is an object oriented CLS-compliant, 2D game engine framework that provides high-level hardware accelerated video, audio, keyboard, mouse, embedded scripting and many image formats. Written in C#, BooGame targets .NET 1.1, 2.0 and Mono platforms.