Open Source BASIC Software Development Software for MS-DOS

Open-source, free, multi-platform BASIC compiler, with syntax similar MS-QuickBASIC (including the GFX statements), that adds new features such as pointers, unsigned data types, inline assembly, a pre-processor and many others.

Agena is an easy-to-learn procedural programming language designed for science, scripting, and many other applications. Binaries are available for Windows, Linux, Solaris, OS/2, Mac OS X, Raspberry Pi and DOS.

This is an insultingly simple project. It's just one file, existential.exe. It's 6 KB in size, has no dependencies or external libraries, and does absolutely nothing whatsoever. So if you need a dummy Windows executable, here ya go.

John's Mutant contains several projects. The current project is an ECMA-55 Minimal BASIC compiler for Linux systems using AMD64 compatible CPUs. You can download the MinimalBASIC compiler source in the Files section.

Napoleon Brandy is development of David Daniels Brandy basic, an interpreter for BBC Basic (or Basic V), This project can not claim ANSI C compliance as Brandy Basic did, but supports Graphics for the platforms implemented. OS currently supported are Win32 and DOS. Currently a preview release as it is functionally incomplete.

UltraBasic is a QBasic compatible compiler, written originally by Gabriel Fernandez, and continued until 2004 by Angelo Rosina. It was hosted on Geocities, and has been moved here because of Geocities shutdown. Source code is in QB PDS 7.

Mateusz's Saucy Editor (MSEDIT) is a simple editor working in the DOS environment. I decided to write it, because I had been using the Microsoft's EDIT editor for years, without finding any free alternative. Of course, there is plenty of free DOS editors out there, but no one has ever matched my expectations (or should I say, my taste). I guess that's because I had already been "formatted" by the MS editor :-) You will probably notice that MSEDIT is very similar to Microsoft's EDIT. That's a pure coincidence, and there is no connection at all between both of them.

The FreeBASIC Standard Library provides a portable, open-source, standardized library of FreeBASIC routines. The Standard Library is separated from the compiler in order to keep the number of keywords at a minimum.

A multi purpose toolbox type library for the FreeBasic programming language. Also with the toolbox, a full fledged Text/ASCII application framework will be developed.

BASIC library for large-integer arithmetic, plus some number theory modules.

Nevasca is an Open Source Graphical Shell enviroment for FreeDOS. Providing multithreaded execution enviroment, graphical user interface and so on.

"Desktop Environment" for DOS (x86) written in QBasic. Needs QBasic compiler (not included in project).