| Dataplan | ⊕ 1993 | ⊕ United Kingdom | |||
| Feel | ⊕ 1993 | ⊕ United Kingdom | |||
| Free | ⊕ 1993 | ⊕ United Kingdom | |||
| HSQL | ⊕ 1993 | ⊕ United Kingdom | |||
| OBLIQ | ⊕ 1993 | ↓ ↑ ⊕ Specialised Languages | ⊕ Actor | ⊕ United Kingdom | OO language for distributed objects |
| Progol | ⊕ 1993 | ↓ ↑ ⊕ Experimental and other | ⊕ United Kingdom | ||
| sceptic 4 | ⊕ 1993 | ↓ ↑ ⊕ Experimental and other | ⊕ United Kingdom | ||
| SDML | ⊕ 1993 | ⊕ United Kingdom | Simulations modelling language | ||
| XSB | ⊕ 1993 | ⊕ United Kingdom |