Unity - The multiplatform game creation tools for everyone.
TripleA - TripleA is a free (under GPL) turn based strategy game based on Axis & Allies board game.
Unreal Engine - Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.
Gravity Free - Gravity Free – Light Particles Manipulation App developed and published by Kfirapps Limited.
Corona SDK - Cross-platform mobile app development.
Particlescape - Particlescape app lets you create stunning patterns at your fingertips.