Open Source Compilers

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.

SDCC is a retargettable, optimizing standard C (ANSI C89 / ISO C90, ISO C99, ISO C11 / C17, ISO C23) compiler that targets a growing list of architectures: STM8, MCS-51, DS390, HC08, S08, Z80, Z180, R800, Rabbit, SM83, eZ80 in Z80 mode, Z80N, TLCS-90, Padauk PDK14 and PDK15 microprocessors. There also is incomplete support for the Microchip PIC16 and PIC18 and the Padauk PDK13 and MOS 6502.

GnuCOBOL (formerly OpenCOBOL) is a free, modern COBOL compiler. GnuCOBOL implements a substantial part of the COBOL 85, X/Open COBOL and newer ISO COBOL standards (2002, 2014, 2023), as well as many extensions included in other COBOL compilers (IBM COBOL, MicroFocus COBOL, ACUCOBOL-GT and others). GnuCOBOL translates COBOL into C and internally compiles the translated code using a native C compiler. Build COBOL programs on various platforms, including GNU/Linux, Unix, Mac OS X, and Microsoft Windows. GnuCOBOL has also been built on HP/UX, z/OS, SPARC, RS6000, AS/400, along with other combinations of machines and operating systems. Copyright 2001-2024 Free Software Foundation, Inc. The cobc compiler is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the FSF; either version 3, or (at your option) any later version. The libcob run time support source tree is licensed under the GNU LGPL.

Lazarus is a free and open source development tool for the Free Pascal Compiler. The purpose of this project is to serve as a Code Repository, Wiki Knowledgebase and support site for converting existing components and libraries to work with Lazarus and the Free Pascal Compiler.

Jad Java decompiler plugin for Eclipse IDE.

Projects joined MinGW-W64, and the new builds will be available on the MinGW-W64 site: https://sourceforge.net/projects/mingw-w64

JSmooth creates standard Windows executable files (.exe) that smartly launch java applications. It makes java deployment much smoother and user-friendly, as it is able to find and run Java VMs by itself, or help the user get one if none are available.

GCBASIC is an open-source BASIC compiler for 8 bit Microchip PIC, Atmel AVR legacy, AVRDx and LGT microcontrollers. See https://ko-fi.com/post/The-Story-of-GCBASIC-Making-Microcontroller-Progr-D1D319SJ72 for story of GCBASIC. This is a continuous release project. The latest release is always available. This will give you the most complete development toolchain to create and program 8-bit PIC, AVR and LGT microcontrollers. We have added new capabilities that make GCBASIC the easiest tool set available - supporting over 1400 microcontrollers with tools to make this fun and simple. Please see the download section for your options. We have two IDEs, we have just the compiler and we have a minimal install - it is your choice. Please see the homepage here: https://gcbasic.com

GDL - GNU Data Language, a free IDL (Interactive Data Language, see http://ittvis.com/idl/) compatible incremental compiler.

gputils is a collection of tools for Microchip PIC microcontrollers. Its goal is to be fully compatible with Microchip's tools, MPASM, MPLINK, and MPLIB.

C/C++ compilers and tools to compile and build for targets DOS 16/32-bit, RDOS, Windows 16/32-bit, OS/2 16/32 bit, Linux 32-bit (x86), Netware running on host OS DOS, Windows 16/32/64-bit, OS/2, Linux 32/64-bit (x86/x64) Open Watcom is now completely moved to GitHub Open Watcom 2.0 https://github.com/open-watcom/open-watcom-v2#open-watcom-v2-fork Open Watcom 1.9 https://github.com/open-watcom/open-watcom-1.9

Freematics Arduino Builder is a fully standalone utility for viewing, compiling, configuring and uploading Arduino sketch or pre-compiled binary to Arduino board without need for any development environment setup. It currently supports AVR, ESP8266 and ESP32.

This project currently provides the GNAT Studio Ada development environment, packaged for macOS. For a source of the compiler and software packages, for various operating systems, see https://ada-lang.io and Alire. For up-to-date releases of the GNAT compiler packaged for macOS, see https://github.com/simonjwright/distributing-gcc/releases. Older releases are retained for historical reasons.

z390 Portable Mainframe Assembler and Emulator

"Aubit 4GL" is a project to make GPL, OpenSource, Informix-4GL compatible compiler, and continue to extend functionality needed to write most efficient and productive business related, database oriented applications. See "Home Page" link for more.

Develop with Java 1.5, deploy native executables for windows, linux and mac! SWT, JFace, AWT and Swing is supported.

The Portable Forth Environment implements the ANSI Forth Standard, it is fully written in C, the newer version has a module concept, and it is fully multithreaded. Autoconf used. Tested in embedded environments.

The Art of Coding: maXbox is a script tool engine, compiler and source lib all in one exe to design and code your scripts in a shellbook! It supports Pascal, Delphi (VCL), Python (P4D), PowerShell and Java Script (Edge WebView).

This is the repository to host all those Harbour's contrib libraries and applications which could not comply with strict Harbour project goals but had the potentiality to march into the future. The goal is to keep this repository parallel with Harbours contrib and use the same build system which Harbour uses. This way it will be possible easily to shift any library/application from here to Harbour or vice-verse. As I am totally ignorant of Harbour's build system, it will be appreciated if someone knowledgeable take over this responsibility, which might be one-time task. Welcome to new chapter in Harbour history! Pritpal Bedi a student of software analysis & concepts

colorForth is, in Chuck Moore's own words: "A dialect of Forth that uses color to replace punctuation. Includes its own operating system. Produces extremely compact programs. Instant compile from pre-parsed source."

cparser is a library containing a parser, lexer and semantic analysis for the ISO C99 language. It should be used as a compiler frontend, a base for source-source transformation, or source-checker tools.

Win32Forth is ANS compatible, Forth language application development system with many tools; Interactive console, integrated extensible debugger, a GUI file editor, hypertext rendering, hyperlinked source files. VIEW <word-name> to explore the many files

1964 is a popular Nintendo64 Emulator for Windows. With the right plugins, you can play almost any Nintendo64 game on your PC.

JavaGuard is a general purpose bytecode obfuscator, designed to fit effortlessly into your regular build and testing process, providing peace of mind that your valuable Java code is more secure against decompilation and other forms of reverse engineering

The TI-Basic compiler compiles TI-BASIC code to the 8XP file format used on Texas Instruments calculators, namely the TI-83, TI-83+ and TI-84+.