github/linguist — pull request #682 by Jaxan (2013-09-13 14:44:00+00:00)
Title: Added Clean language

With the blue color from: http://wiki.clean.cs.ru.nl/Clean

Besides my own projects I could only find these other uses:
* https://github.com/Meidor/FuncProgrammeren
* https://github.com/Wassasin/clean-streams