Unity - The multiplatform game creation tools for everyone.
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
LOVE 2D - Hi there! LÖVE is an *awesome* framework you can use to make 2D games in Lua.
RenPy - Ren'Py is a free and cross-platform visual novel engine that helps you use words, pictures, and...
Pygame - Pygame is a set of Python modules designed for writing games.
Quest - Quest lets you create sophisticated text-based games, without having to program.