| Jan Bednarik | 1 | 3 |
| Jan Chmelik | 1 | 2 |
| Jan De Graaff | 1 | 2 |
| Jan Engelhardt | 1 | 1 |
| Jan Eric Krprianidis | 1 | 1 |
| Jan Hubicka | 1 | 1 |
| Jan Kara | 1 | 1 |
| Jan Kybic | 1 | 2 |
| Jan Schutze | 1 | 2 |
| Jandus Technologies | 1 | 1 |
| Janet-lang | 1 | 1 |
| Janetter | 1 | 2 |
| Janguo | 2 | 3 |
| Janino Project | 1 | 1 |
| Janitza | 5 | 35 |
| Jannis Thuemmig | 1 | 1 |
| Janobe | 1 | 2 |
| Janrain | 3 | 7 |
| Jansson Project | 1 | 3 |
| Jantek | 1 | 2 |
| Janusintl | 3 | 3 |
| Jaow | 1 | 1 |
| Japan Agency For Local Authority Information Systems | 6 | 7 |
| Japan Atomic Energy Agency | 1 | 1 |
| Japan Computer Emergency Response Team Coordination Center (JPCERT/CC) | 1 | 2 |
| Japan Construction Information Center | 1 | 3 |
| Japan Pension Service | 4 | 4 |
| Japan Total System Co.,Ltd. | 2 | 10 |
| Japan Radio | 2 | 4 |
| Japanese Php Gallery Hosting | 1 | 1 |
| Jappix Project | 1 | 1 |
| Jara | 1 | 2 |
| Jared Meeker | 1 | 2 |
| Jaredeckersley | 1 | 1 |
| Jarle Aase | 1 | 1 |
| JasPer | 1 | 4 |
| JasPer Project | 1 | 4 |
| Jasco | 1 | 1 |
| Jasig | 1 | 2 |
| Jasig Project | 1 | 1 |
| Jasio.net | 1 | 2 |
| Jasmine | 1 | 45 |
| Jasmine Technologies | 1 | 2 |
| Jason Bobich | 1 | 1 |
| Jason Crouse, VeronaLabs | 1 | 7 |
| Jason Gauci | 1 | 4 |
| Jason Lau | 1 | 2 |
| Jason Rouet | 1 | 1 |
| Jason A Donenfeld | 1 | 9 |
| Jason Alexander | 1 | 1 |
| Jason Boettcher | 1 | 2 |
| Jason Flatt | 1 | 2 |
| Jason Frisvold | 1 | 1 |
| Jason Geiger | 1 | 8 |
| Jason Hines | 1 | 2 |
| Jason Moore | 1 | 1 |
| Jason Orcutt | 1 | 1 |
| Jason Rahaim | 1 | 1 |
| Jason Savino | 1 | 1 |
| Jason Sexauer | 1 | 1 |
| Jason Smith | 1 | 6 |
| Jason W. Bacon | 1 | 1 |
| Jasper | 1 | 5 |
| Jasper Jpeg-2000 | 1 | 1 |
| Jasper Project | 1 | 94 |
| Jasperforge | 1 | 1 |
| Jaspersoft | 1 | 1 |
| Jasypt Project | 1 | 1 |
| Jath Pala | 1 | 1 |
| Jatos | 1 | 1 |
| Jaumo | 1 | 1 |
| Java-merge-sort Project | 1 | 1 |
| Java-xmlbuilder Project | 1 | 1 |
| JavaEZLib | 1 | 1 |
| Java Search Engine | 1 | 1 |
| Javaatwork | 1 | 1 |
| Javadelight | 1 | 2 |
| Javamelody Project | 1 | 3 |
| Javaquarkbbs Project | 1 | 1 |
| Javascript | 1 | 1 |
| Javaswaptest Project | 1 | 1 |
| Javasystemsolutions | 1 | 1 |
| Javaweb Blog Project | 1 | 2 |
| Javier Fernandez | 1 | 1 |
| Javier Suarez Sanz | 1 | 3 |
| Jaws | 1 | 11 |
| Jaws Project | 1 | 11 |
| Jax Calendar | 1 | 1 |
| Jax Scripts | 3 | 6 |
| Jaxbot | 1 | 3 |
| Jaxbox Project | 1 | 1 |
| Jaxcms | 1 | 1 |
| Jaxultrabb | 1 | 3 |
| Jay-jayx0r | 1 | 1 |
| Jay Eckles | 1 | 1 |
| Jaycar | 1 | 3 |
| Jayde Online | 1 | 1 |
| Jayeshp | 1 | 1 |
| Jayj | 1 | 1 |
| Jayj Quicktag Project | 1 | 1 |
