| Language | Paradigms | First appeared | Developer |
|---|---|---|---|
| CLISP | — | — | GNU Project |
| GAP | — | 1986 | — |
| GNU Prolog | constraint logic programming | 1996 | GNU Project |
| Haxe | object-oriented programming, multi-paradigm programming, functional programming, generic programming | 2005 | Simon Krajewski, Cauê Waneck, Haxe Foudation, Nicolas Cannasse |
| Hop | multi-paradigm programming, functional programming, multitier programming | 2006 | — |
| MIT/GNU Scheme | — | — | Massachusetts Institute of Technology |
| Opal | functional programming | — | — |