Suneido™ is a complete, integrated application platform - a system for developing and deploying applications without the frustrations of integrating multiple different products. Suneido incorporates an object-oriented programming language, client-server relational database software, and application frameworks and components. It includes the integrated development environment (IDE) used to create applications as well as the client and server required to run applications across networks. Suneido is Open Source - it is provided free, with complete source code.

Bloodshed Dev-C++ is a full-featured Integrated Development Environment (IDE) for the C/C++ programming language. It uses Mingw port of GCC (GNU Compiler Collection) as it's compiler. Dev-C++ can also be used in combination with Cygwin or any other GCC based compiler.

DJGPP is a complete 32-bit C/C++ development system for Intel 80386 (and higher) PCs running DOS. It includes ports of many GNU development utilities. The development tools require a 80386 or newer computer to run, as do the programs they produce.

MinGW :: A collection of freely available and freely distributable Windows specific header files and import libraries combined with GNU toolsets that allow one to produce native Windows programs that do not rely on any 3rd-party C runtime DLLs.

Visual automatic code generator and complete Windows programming environment

The Netwide Assembler, NASM, is an 80x86 assembler designed for portability and modularity. It supports a range of object file formats

XBasic is a comprehensive program development environment that integrates a powerful editor, compiler, debugger, function libraries and GuiDesigner into a seamless working environment that encompasses the whole process of creating fast, efficient, reliable, portable 32-bit programs.  XBasic screenshot.

XBasic programs can create any number of windows, each of which supports input from keyboard & mouse, and output of text & graphics.  And sophisticated GUI programs are easy to develop with the interactive graphical GuiDesigner built right into the program development environment.

wxBasic is an Basic interpreter that is:
* Free
* Open Source (LGPL)
* Cross-platform (currently Windows and Linux)

ScriptBasic implements a rich set of instructions that are available under Win32 as well as under Linux/UNIX. Programs written in ScriptBasic are portable unless you work hard to insert some system specific code.

Yabasic implements the most common and simple elements of the basic language; It comes with goto/gosub, with various loops, with user defined subroutines and Libraries. Yabasic does monochrome line graphics and printing. Yabasic runs under Unix and Windows; it is small (around 200KB) and free.