| ISO Prolog | ⊕ 1997 | ↓ ↑ ⊕ String and List Processing | ⊕ Horn clause | ⊕ International | |
| Leogo | ⊕ 1997 | ↓ ↑ ⊕ String and List Processing | ⊕ List | ⊕ New Zealand | Logo with multimodal interface |
| NUOO-Prolog | ⊕ 1997 | ↓ ↑ ⊕ String and List Processing | ⊕ Horn clause | ⊕ Australia | |
| XLISP 3 | ⊕ 1997 | ↓ ↑ ⊕ String and List Processing | ⊕ Lazy Evaluation LISPs | ⊕ United States |