FreeBASIC is a multiplatform, free/open source (GPL) BASIC compiler for Microsoft Windows, protected-mode MS-DOS (DOS extender), Linux, FreeBSD and Xbox.
License: Open Source
FreeBASIC is a procedural programming language that focuses on low-level system programming and ease of use for beginners, while REBOL is a more expressive language designed for rapid application development and networking. The key differences lie in their syntax, use cases, and community support.