RemoteHQ - Real-time collaboration for distributed teams
BlitzPlus - Create 2D Games for Windows.
Diagrams for Mac - A diagram editor for visualizing structures and processes
BlitzMax - With the developing version BlitzMax NG other 'targets' are available: ARM architecture, Raspberry, Android, HTML (Emscripten). RAPID DEVELOPMENT. Just open the IDE, write your code, hit F5 and see immediately the results!
Stately Viz - Visualize, simulate, and inspect your state machines
Monkey 2 - An easy to use, cross platform, games oriented programming language