[fuzzythinker]

More developed alternatives:

http://coconut.readthedocs.io/en/master/DOCS.html

https://github.com/i2y/mochi

[brightsize]

I find Mochi to be an interesting language but unfortunately it appears to be abandonware. https://github.com/i2y/mochi/pulse/monthly

[fuzzythinker]

Last month activity often doesn't indicate the bitrot-ness of a project. "Graphs" paints a better image of its health. In this case, it does show the project is abandoned. Regardless, I think coconut is the more developed project out of the two.

[josch]

But they are not implemented as just a library.