FreeBASIC
- http://www.freebasic.net/
- A 32-bit BASIC compiler, with the syntax the most compatible possible with MS-QuickBASIC, that adds new features such as pointers, unsigned data types, inline-assembly. [Open-source, LGPL]
Full Moon Software
- http://www.ethanwiner.com/
- offers add-on products and utilities for several Basic languages for DOS. The entire catalog and some demo programs are available for download.
GFA Basic Windows Programming
- http://www.baphead.freeserve.co.uk/
- This site is designed to give users of GFA Basic Windows help. It has a beginners section where no previous knowledge is required, an amateurs section where you can improve your skills and an experts section where you can find out about advanced programming techniques.
Lemick
- http://lemick.sourceforge.net/
- A project to make a programming language similar to those traditional Basic implementations but with all the attributes of the modern programming tool. Current version is a bytecode compiler and interpreter/JIT compiler implemented in pure C with flex (scanner) and bison (parser).
NBASIC
- http://sylvaware.home.mindspring.com
- A BASIC interpreter designed to mimic the operation of 8/16bit microcomputers of the early 1980's like the Tandy Color Computer, Apple IIe, Commodore 64, Texas Instruments TI-99/4A.
ScriptBasic
- http://www.scriptbasic.com/
- Open Source GPL BASIC interpreter supporting Win32, UNIX, Linux. Rich set of features, many built-in functions. External modules written in C. Modular. Interpreted internal code. Internal code cache for fast execution. Compiled to C. Source is pure C.
Ubercode
- http://www.ubercode.com
- Windows programming languages Ubercode, a BASIC-like language, and Visual Fred, a VisualBasic-compatable language.
VMM Basic
- http://www.balrogsoftware.com/vmbasic/
- A virtual machine that execute a byte-code program, compiled from language, the syntax is similar to Basic languages, that have intern motion detection commands, intern sprite commands based on DirectX, network commands, for simplify game development.
XCSB (XC Structured BASIC)
- http://xcprod.com/titan/XCSB/
- Optimising structured PIC BASIC compiler producing fast native machine code for the PIC microcontroller. [LITE version is FREE for personal non-commercial use]
thinBasic
- http://www.thinbasic.com
- Windows BASIC-like script interpreter for Windows versions with Internet Explorer 5.5 or higher. Developed in Power Basic.
wxBasic
- http://wxbasic.sourceforge.net/
- A free, Open Source Basic interpreter for creating portable GUI applications in Windows and Linux. Can create stand-alone executables.