ClanLib

Home: http://www.clanlib.org/, https://directory.fsf.org/wiki/Clanlib, https://sourceforge.net/projects/clanlib/, https://www.seul.org/~grumbel/tmp/clanlib/intro.html
State: mature
Platform: Windows, Linux
Keyword: game engine
Code repository: https://github.com/sphair/ClanLib.git (@created 2013, @stars 277, @forks 64)
Code language: C, C++
Code license: zlib
Developer: Mark Page, Magnus Norddahl, Kenneth Gangstø, Grizmu, Artem, Chu Chin Kuan, Lethal Ghost, roothorick, authenticate, xantares, Pyrdacor, Jeremy Cochoy

Medium level development kit. Which games use ClanLib?

Building