newLisp is described as 'newLISP is a LISP-like scripting language for doing things you typically do with scripting languages: programming for the internet, system administration, text processing, gluing other programs together, etc' and is an app in the Development category. There are four alternatives to newLisp for Mac, Windows, Linux and BSD. The best alternative is Hy, which is both free and Open Source. Other great apps like newLisp are CLISP (Free, Open Source), Nu (Free, Open Source) and GNU Common Lisp (Free, Open Source).
Hy is a wonderful dialect of Lisp that’s embedded in Python. Since Hy transforms its Lisp code into the Python Abstract Syntax Tree, you have the whole beautiful world of Python at your fingertips, in Lisp form!
CLISP is a portable ANSI Common Lisp implementation and development environment by Bruno Haible. Interpreter, compiler, debugger, CLOS, MOP, FFI, Unicode, sockets, CLX. UI in English, German, French, Spanish, Dutch, Russian, and Danish.