VHDL 2008/93/87 simulator
The Small Device C Compiler (SDCC), targeting 8-bit architectures
A free COBOL compiler
Portable version of the multifunctional development platform Eclipse.
ECLiPSe Constraint Logic Programming System
The regex-centric, fast lexical analyzer generator for C++
fast, portable Pascal compiler using gnu c as intermediate code
A minimalistic but complete standard Forth compiler in C
ANSI Standard MUMPS
Open Utlity is series of unix utlity just like gnu for linux / windows
Parsing for everybody.