Sqrat is a C++ library for Squirrel that facilitates exposing classes and other native functionality to Squirrel scripts. It models the underlying Squirrel API closely to give access to a wider range of functionality than other binding libraries. In addition to the binding library, Sqrat features a threading library and a module import library.
Sqrat only contains C++ headers so for installation you just need to copy the files in the include directory to some common header path.
Discussion about Sqrat happens at the Squirrel language forum, the Bindings section http://squirrel-lang.org/forums/default.aspx?g=topics&f=4
Bug reports or feature enhancement requests and patches can be submitted at the SourceForge Sqrat site https://sourceforge.net/p/scrat/sqrat/