gnu compiler

DiskCryptor - is the only truly free solution, provided under GNU.

SharpArchiver is an open source program released under the GNU LGP Llicense

GNOME is Free Software and part of the GNU project.

A free software package licensed under the GNU General Public License (GPL)

A multi-boot loader or boot manager based on GNU GRUB

Attesoro - Free translation editor for Java programs (GNU GPL)

Turbo Pascal is the world-standard Pascal compiler.

Visual Prolog 7.3 PE, Programming environment: compiler, IDE, linker, debugger.

JetC# is a simple code editor and compiler for c# language.

Simple and lightweight C# IDE + compiler.