
Lisp
Lisp is a family of computer programming languages with a long history and a distinctive, fully parenthesized syntax. Originally specified in 1958, Lisp is the second-oldest high-level programming language in widespread use today; only Fortran is older. http://en.wikipedia.org/wiki/Lisp_%28programming_language%29
PowerLisp - An implementation of Lisp for Mac OS 9. PowerLisp 2.02 is being released with complete source code (the entire product, including editor, can be built from scratch). This product is free for personal use
http://www.cormanlisp.com/PowerLisp.html
DotLisp - An interactive, Lisp-like language for .Net scripting and development, having deep .Net integration, sharing type system, GC and other runtime services etc., with transparent access to .Net w/o a FFI or wrappers..
http://sourceforge.net/projects/dotlisp/
Lisp Studio v2.0 - Common Lisp development system. Includes command-line and IDE Lisp interpreters. Supported platforms appear to include Win32 and .NET environment.
http://www.ufasoft.com/lisp/