| Language | First appeared | Developer |
|---|---|---|
| Beatnik | — | Cliff L. Biffle |
| Factor | 2003 | Slava Pestov |
| Forth | 1970 | Charles H. Moore |
| Joy | 2001 | — |
| Mouse | — | — |
| PostScript | 1982 | Adobe |
| RPL | 1984 | — |
| Script | — | — |
| Uiua | — | — |
| WebAssembly | 2015 | World Wide Web Consortium, Mozilla, Google, Apple Inc., Microsoft |