This software called "zCatch/TeeVi" is a modification of "zCatch" which is a modification of "Teeworlds".
DDNet version, with global ranking. Made by Savander and Deen.
Teewebs.net supported (by Eeeee).

See license.txt.

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The following is the content of the readme.txt distributed with zCatch:
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Copyright (c) 2012 Magnus Auvinen


This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.


Please visit http://www.teeworlds.com for up-to-date information about 
the game, including new versions, custom maps and much more.