From RBOSE
Free and Open Source Programming Languages are languages that are released under foss licenses.
| Title | Language | Implementation License | Additional Information |
|---|---|---|---|
| ALGOL 68G | ALGOL 68 | GPL | |
| Bigaloo | Scheme | GPL, LGPL | |
| Chicken | Scheme | BSD | |
| Erlang | Erlang | Modified MPL | |
| Gambit | Scheme | LGPL/Apache License | |
| Glasgow Haskell Compiler (GHC) | Haskell | BSD | |
| GCC | C/C++/Objective-C/ASM | GPL | |
| Harbour | Harbour | GPL | |
| Haskell User's Gofer System | Haskell | BSD | |
| Helium | Haskell | GPL | |
| Java | Java' | GPL | |
| JRuby | Ruby | CPL/GPL/LGPL | |
| Jython | Python | PSF License (GPL Compatible) | |
| Kawa | Scheme | MIT License | |
| nhc98 | Haskell | GPL v2 | |
| PERL | PERL | Artisitic License or GPL | |
| PHP | PHP | PHP License (BSD style) | |
| Python | Python | PSF License (GPL Compatible) | |
| Rubiniu | Ruby | BSD | |
| Ruby MRI | Ruby | Ruby License or GPL | |
| Ruby.NET | Ruby | New BSD | |
| TCL | TCL | BSD | |
| XRuby | Ruby | GPL v2 | |
| Yarv | Ruby | Ruby License |