|Release date||February 24th, 2009|
|Tennix! is a free game. This means that the source code is available to be studied, modified, and distributed. Most projects look for help with testing, documentation, graphics, etc., as well.|
Tennix! is a tennis game, licensed under the GPLv2 and developed by Thomas Perl. The latest version is 0.6.1, released on March 27th, 2008. It was written in the C programming language using the SDL library.