A reasonable FOSS library in C++ for those attempting to quickly play with coherent noise (Perlin, cellular) is http://libnoise.sourceforge.net/ http://libnoise

A reasonable FOSS library in C++ for those attempting to quickly play with coherent noise (Perlin, cellular) is http://libnoise.sourceforge.net/ http://libnoise.sourceforge.net/ Used it in a couple of projects and been happy with the ease of use. Also has some good doc pages to supplement those in the linked article.