| 3DComposer | 1999 | ||||
| ACE | 1999 | ||||
| ALSO | 1999 | Language for Extensible Multi-user Systems | |||
| Armani | 1999 | ⊕ United States | |||
| AspectJ | 1999 | ||||
| BBj | 1999 | ||||
| C# | 1999 | ↓ ↑ ⊕ Multi-purpose | ⊕ OO C family | ⊕ United States | Simple portable systems language |
| C2 AML | 1999 | ⊕ United States | |||
| Caché ObjectScript | 1999 | ↓ ↑ ⊕ Business Data Processing | ⊕ United States | Scripting language for Caché 5 database systems | |
| CCC | 1999 | ⊕ Japan | |||
| ccGolog | 1999 | ↓ ↑ ⊕ Specialised Languages | ⊕ Robotics | ⊕ Germany | Plan language for robotics |
| CFUF | 1999 | ⊕ Germany | |||
| CINT | 1999 | ↓ ↑ ⊕ On-Line | ⊕ United States | C/C++ Interpreter | |
| CLIP | 1999 | ↓ ↑ ⊕ String and List Processing | ⊕ Japan | Parallel Common LISP dialect | |
| COBOLScript | 1999 | ↓ ↑ ⊕ Business Data Processing | ⊕ Japan | Embedded COBOL scripting system | |
| Concurrent Massey Hope+C | 1999 | ↓ ↑ ⊕ Experimental and other | ⊕ New Zealand | Concurrent Dialect of Massey Hope | |
| Cymbal | 1999 | ⊕ United States | Database language | ||
| D | 1999 | ⊕ OO C family | Object oriented C dialect | ||
| D4 | 1999 | ↓ ↑ ⊕ Business Data Processing | ⊕ Array | ⊕ Ireland | APL with matching |
| DBN | 1999 | ||||
| DESL | 1999 | ⊕ United States | |||
| DESMO-J | 1999 | ⊕ Germany | |||
| EDDI | 1999 | ⊕ United Kingdom | |||
| Eden | 1999 | ⊕ Japan | |||
| EDEN | 1999 | ⊕ United States | |||
| Elaya | 1999 | ||||
| EMMA | 1999 | ⊕ Austria | |||
| EMU | 1999 | ||||
| Epigram | 1999 | ⊕ United Kingdom | dependently typed functional programming language | ||
| ETL | 1999 | ||||
| Euler | 1999 | Maths language | |||
| EUPHORIA | 1999 | ⊕ Canada | End User Programming Hierarchial Objects for Robust Interpreted Applications | ||
| EXPRESS | 1999 | CNC Language | |||
| FACILE | 1999 | ⊕ Numerical Control | |||
| Felix | 1999 | ||||
| Fickle-99 | 1999 | ⊕ United Kingdom | |||
| FLORID | 1999 | ⊕ Germany | |||
| Formulate | 1999 | ||||
| FROB | 1999 | ↓ ↑ ⊕ Specialised Languages | ⊕ Robotics | ⊕ United States | FRP dialect featuring robotic control |
| F-Script | 1999 | ||||
| Functional Developer | 1999 | ⊕ United States | |||
| FUNKY | 1999 | ⊕ United States | Robotics Language | ||
| FVision | 1999 | ⊕ United States | |||
| GAL | 1999 | ⊕ France | |||
| GED | 1999 | ⊕ United States | |||
| GPL | 1999 | ||||
| Grrr | 1999 | ||||
| Hancock | 1999 | ||||
| HTEL | 1999 | ↓ ↑ ⊕ Multi-purpose | ⊕ Netherlands | Hypertext Expression Lanugage | |
| HyperFun | 1999 | ||||
| IDOL | 1999 | ⊕ United States | Object-oriented extension to ICON | ||
| JoCAML | 1999 | ↓ ↑ ⊕ Specialised Languages | ⊕ France | ||
| LaSt | 1999 | ↓ ↑ ⊕ String and List Processing | ⊕ Description languages | ⊕ United States | |
| Localizer | 1999 | ||||
| LOOR | 1999 | ||||
| Magik | 1999 | ↓ ↑ ⊕ Specialised Languages | ⊕ United Kingdom | ||
| MCPL | 1999 | ↓ ↑ ⊕ Multi-purpose | ⊕ CPL, BCPL and B | ⊕ United Kingdom | Matching CPL |
| Mercury | 1999 | ||||
| METAJ | 1999 | ⊕ France | |||
| mJaba/LR | 1999 | ⊕ Japan | |||
| MQL | 1999 | ↓ ↑ ⊕ Business Data Processing | ⊕ Ad hoc query languages | ⊕ Denmark | Query language for EMDROS text database |
| NetBasic | 1999 | ⊕ United States | |||
| NetLogo | 1999 | ⊕ United States | |||
| OCL | 1999 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Object Constraint Language | |
| ONTOS | 1999 | ⊕ United States | |||
| OPML | 1999 | ⊕ United States | Outlining structure language | ||
| Piccola1 | 1999 | ⊕ Switzerland | |||
| PL0/E | 1999 | ⊕ Germany | |||
| PreQL | 1999 | ||||
| PT | 1999 | ||||
| ROL2 | 1999 | ⊕ Canada | |||
| RT-Z | 1999 | ||||
| SAL | 1999 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | for Spatial Aggregation Language | |
| Sassy | 1999 | ↓ ↑ ⊕ Specialised Languages | ⊕ United States | Parallel dialect of C | |
| SLIM | 1999 | ||||
| Sonnet | 1999 | ⊕ United States | |||
| SOUL | 1999 | ⊕ Belgium | |||
| SPARK95 | 1999 | ↓ ↑ ⊕ Multi-purpose | ⊕ United Kingdom | Provable Ada95 | |
| Spring | 1999 | ⊕ United States | |||
| SURE Input Language | 1999 | ||||
| Theseus | 1999 | ⊕ Germany | |||
| ToonTalk 2 | 1999 | ⊕ United States | |||
| UPC | 1999 | ⊕ United States | Unified Parallel C | ||
| Vision:Report | 1999 | ⊕ United States | |||
| Vorlon | 1999 | ⊕ United Kingdom | |||
| V-Promela | 1999 | ⊕ United States | |||
| WAKABA | 1999 | ⊕ Japan | |||
| WinEGS | 1999 | ↓ ↑ ⊕ Specialised Languages | ⊕ Monte Carlo | ⊕ Canada | Graphical Monte Carlo simulation system |