Browse free open source Compilers and projects for Windows below. Use the toggles on the left to filter open source Compilers by OS, license, language, programming language, and project status.
A native Windows port of the GNU Compiler Collection (GCC)
A code generator for connecting C/C++ with other programming languages
A free C, C++ and Fortran IDE
Open Source C & C++ IDE for Windows
Dex to Java decompiler
Free 32/64/16-bit multi-platform Pascal and Object Pascal compiler
A fast, portable, simple, and free C/C++ IDE
Common Lisp compiler and runtime
The Small Device C Compiler (SDCC), targeting 8-bit architectures
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata
A free COBOL compiler
x64 build of GCC for Windows
GCC for 32-bit and 64-bit Windows with a real installer & updater
A decompiler for Lua 5.x
Free compiler and development environment for Pascal
Decompiler from Java bytecode to Java, used in IntelliJ IDEA
An open source Java decompiler Gui for Procyon
tmux is a terminal multiplexer
Dual-target (32 & 64-bit) MinGW-W64 compilers for 32 & 64-bit Windows
Pascal XE is an easy to use IDE for Pascal programming.