See the Io programming language: "Io is a small, prototype-based programming language. The ideas in Io are mostly inspired by Smalltalk (all values are objects

See the Io programming language: "Io is a small, prototype-based programming language. The ideas in Io are mostly inspired by Smalltalk (all values are objects), Self (prototype-based), NewtonScript (differential inheritance), Act1 (actors and futures for concurrency), LISP (code is a runtime inspectable/modifiable tree) and Lua (small, embeddable)."