 "WorldForge" is another example of increasing diversification, in its attempt to create a free massively multiplayer online role playing game.Free software is also the main source for educational and children's software specifically for Linux, usually utilizing the child appeal of the Tux mascot, such as "Tux Paint", "Tux, of Math Command", "Tux Typing" and related efforts.The rise of the independent game development in the 2000s was partly driven by the growing ecosystem of open source libraries and engines; indie developers utilized the open source ecosystem due to good cross-platform capabilities and availability for limited financial burden.