Factor

Paradigms	functional programming, stack-oriented programming, multi-paradigm programming, concatenative programming
Typing discipline	dynamic typing, strong typing
First appeared	2003
Designed by	Slava Pestov
Developer	Slava Pestov
Type	programming language
Influenced by	Self, Joy, Lisp, Forth
License	BSD licenses
Latest version	0.102
Website	factorcode.org
Written in	Factor