tmux is a terminal multiplexer
The Small Device C Compiler (SDCC), targeting 8-bit architectures
Simple C compiler
Application-scale JavaScript
A free COBOL compiler
A minimalistic but complete standard Forth compiler in C
ECLiPSe Constraint Logic Programming System
The regex-centric, fast lexical analyzer generator for C++
(X)BNF simple and clever translation grammar compiler
fast, portable Pascal compiler using gnu c as intermediate code
Open Watcom C/C++ compilers and tools Fork
Free 32/64/16-bit multi-platform Pascal and Object Pascal compiler
A BASIC interpreter and compiler with graphics.
bang jago emulator
ANSI Standard MUMPS
A GHC-based Haskell to JavaScript compiler
Tiny education compiler that can compile itself
An experimental BASIC language for Linux, Mac OS X, and Windows.