LÖVE (also known as Love 2d) is a free 2D game engine self described as "an *awesome* framework you can use to make 2D games in Lua. It's free, open-source, and works on Windows, Mac OS X and Linux." Love is licensed under zlib and thus can be used for both free and non-free projects.
For more information on how to make a game or program with love, see the Love2d Wiki
How to Install in Fedora
Love has been reviewed and has been submitted for updates testing.
Love can be installed either by using updates-testing or downloading the builds on koji. Both methods are described below
The easiest way would be just to run the following with administrative privileges (i.e. either with sudo or su)
yum --enablerepo=updates-testing upgrade love
Current builds can be found here: http://koji.fedoraproject.org/koji/packageinfo?packageID=13709
Currently Not Tetris doesn't seem to work with love version 0.8.0 but the developers have been contacted and hopefully it gets fixed.