C, C++, Objective C, Fortran, Java, and Ada
The GNU Compiler Collection
Oracle Java Site
Java Technologies
Common Lisp
Steel Bank Common Lisp
Scheme
Racket
ML
Standard ML of New Jersey
Haskell
Haskell
Prolog
SWI-Prolog
Smalltalk
Squeak Smalltalk
Erlang
Erlang