Fraidycat is the first piece of open-source software I noticed using Blue Oak Model License.
I'm a bit confused, tho: the only real content is:
> This license gives everyone as much permission to work with this software as possible, while protecting contributors from liability.
This doesn't really sound unambiguous to me (but maybe that's because English is not my native language). As comparison from The Unlicense:
> Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means.
Somehow that's much clearer to me.