REBOL is described as 'Rebol (historically REBOL) is a cross-platform data exchange language and a multi-paradigm dynamic programming language designed by Carl Sassenrath for network communications and distributed computing. It introduces the concept of dialecting: small, optimized, domain-specific' and is a programming language in the development category. There are more than 50 alternatives to REBOL for a variety of platforms, including Linux, Windows, Mac, BSD and Self-Hosted apps. The best REBOL alternative is Python, which is both free and Open Source. Other great apps like REBOL are PHP, C (programming language), C++ and Node.js.