Heads up: No license given in the repo, be careful if you are thinking of using this for a project.

EDIT: Retracted -- did a search like for "license", but apparently the search results omits variants like "sublicense" which would have caught the MIT license at the beginning of the source file: https://github.com/scandum/blitsort/search?q=license vs. https://github.com/scandum/blitsort/search?q=sublicense