The combination of scripting and compiled languages is very powerful. It gives us the things we've come to love about compiled languages: type safety, performance, thread safety options, consistent memory model while also giving us the flexibility to try something new quickly without a full rebuild.
The VM based compiled languages have learned this already: JRuby, Jython, IronRuby, IronPython
- ChaiScript
- AngelScript
- luabind
- sol2 (bindings for Lua)
- SWIG