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
D is a powerful, high-performance language with a focus on system-level programming and concurrency, while FreeBASIC is designed for simplicity and ease of use, making it more approachable for beginners and suitable for quick development tasks.