A free C, C++ and Fortran IDE
Neovim compiler for building and running your code
The compiler for ReScript
The GNU Prolog native compiler
The core OCaml system: compilers, runtime system, base libraries
A friendly Forth compiler with a little difference
VHDL 2008/93/87 simulator
A fast compiler cache
The Small Device C Compiler (SDCC), targeting 8-bit architectures
WinLibs standalone build of GCC and MinGW-w64 for Windows
(X)BNF simple and clever translation grammar compiler
A free COBOL compiler
Ox is an attribute-grammar evaluator generator.
Interpreter and compiler for the Seed7 programming language.
Basic programming language for Windows & Linux
Vampirio Code, a great Code Editor and Compiler
amforth is an extendible interpreter on microcontrollers