A programming language (MacroLanguage) that was designed to be embedded into other programs.
Authors: Roberto Ierusalimschy, Waldemar Celes, Luiz Henrique de Figueiredo Homepage: http://www.lua.org Projects: http://luaforge.net/ Research: http://www.lua.inf.puc-rio.br/
It was originally designed and implemented in Brazil. It supports all the usual string, object, exception processing plus co-routines and a closure concept similar to Lisp. Cool stuff.