This has never been mentioned here, a fork of Squirrel by Gaijin Entertainment, now a different language:
https://github.com/GaijinEntertainment/quirrel
Quirrel is a script language that is based on Squirrel language and is inspired by Python, Javascript and especially Lua (The API is very similar and the table code is based on the Lua one). Whole syntax and documentation can be read in an approximately an hour, and it looks almost familiar if you know Javascript or C++.
It also includes Sqrat, heavily modified.