| Active-U-Datalog | ⊕ 1997 | ⊕ Italy | U-Datalog extended for active databases | ||
| Algae | ⊕ 1997 | ⊕ United States | |||
| Alma | ⊕ 1997 | ⊕ Netherlands | Imperative Constraint Programming Language | ||
| CafeObj | ⊕ 1997 | ⊕ Japan | OBJ for the CAFE Networked Environment | ||
| FLINT | ⊕ 1997 | ⊕ United States | |||
| FLO | ⊕ 1997 | ⊕ France | |||
| Forum | ⊕ 1997 | ⊕ Japan | |||
| FRP | ⊕ 1997 | ⊕ United States | |||
| GOQL | ⊕ 1997 | ||||
| HIRAM | ⊕ 1997 | ⊕ United States | |||
| Lagoona | ⊕ 1997 | ⊕ United States | |||
| MOZART | ⊕ 1997 | ⊕ Germany | |||
| NEL | ⊕ 1997 | ⊕ Germany | Natural Expert Language | ||
| ParaLog_e | ⊕ 1997 | ⊕ Brazil | |||
| SAC | ⊕ 1997 | ⊕ Germany | Single Assignment C | ||
| TILT | ⊕ 1997 | ⊕ United States | |||
| U-Datalog | ⊕ 1997 | ⊕ Italy | |||
| Yale Haskell | ⊕ 1997 | ⊕ United States | Yale implementation of Haskell |