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Grit Game Engine - The Grit Game Engine is an MIT-Licensed Open Source Game Engine that is highly scriptable via Lua.
Time Doctor - Time Tracking and Time Management Software that is accurate and helps you to get a lot more done each day.
libtwo - All-purpose c++ app prototyping library, focused towards live graphical apps and games
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
MOS - Lightweight game engine.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.