FreeBASIC
- A free 32-bit MS-QuickBASIC's syntax-compatible compiler for Windows, that adds new features such as pointers, unsigned data types, inline-assembly. [Open source, LGPL]
- http://www.freebasic.net/

Basic Decompiler
- A DOS Basic decompiler. Author also offer a text recovery service to anyone who has lost their Basic source code.
- http://members.aol.com/mspring810/private/index.htm

QB2C
- QuickBasic to C converter. Installation and programming support, sample and working program downloads, latest releases and sales information.
- http://www.bastoc.com/