Torque Game Builder
... Make your game with the world's most powerful 2D game engine, making use of sprites, scrolling backgrounds, 3D objects, TorqueNET Lite networking, physics, and collision detection.
The Game Builder 2D Toolset, coupled with TorqueScript, allows easy access to user interface creation, effects, tiles, level building, and packaging. If you know Flash, Visual Basic, or another scripting language, you will have no problem coding in TorqueScript to make your game.
Version 1.7.5: Release notes were unavailable when this listing was updated.