| Name | Repositories | Stars | Stars this week |
|---|---|---|---|
| Unleash | 2 | 11,106 | 30 |
| UnkL4b | 1 | 2,086 | 1 |
| UnixJunkie | 4 | 132 | 0 |
| UniversalRobots | 1 | 405 | 5 |
| UniversalDataTool | 1 | 1,943 | 4 |
| UniversalAvenue | 1 | 22 | 0 |
| Unity-Technologies | 3 | 14,467 | 32 |
| Unitech | 1 | 41,382 | 16 |
| UnionInternationalCheminsdeFer | 1 | 56 | 0 |
| Uninen | 1 | 13 | 0 |
| Unidata | 1 | 237 | 0 |
| UnicornGlobal | 1 | 31 | 0 |
| UniMath | 1 | 954 | 2 |
| UngeUI | 1 | 54 | 0 |
| UnfortuN8 | 1 | 3 | 0 |
| UnexpectedMaker | 1 | 13 | 0 |
| UnderstandLingBV | 1 | 60 | 0 |
| UnderGreen | 1 | 343 | 0 |
| Uncommon | 1 | 993 | 6 |
| UlyssesZh | 1 | 0 | 0 |
| Ulydev | 4 | 682 | 2 |
| Ultimator14 | 2 | 0 | 0 |
| UltimateHackers | 6 | 31,622 | 60 |
| Ultimaker | 1 | 6,094 | 15 |
| Ullink | 1 | 470 | 0 |
| Ullaakut | 1 | 4,055 | 3 |
| UlionTse | 1 | 1,637 | 7 |
| Uhlo | 1 | 7 | 0 |
| UglyTroLL | 1 | 37 | 0 |
| UchihaL | 1 | 41 | 0 |
| UbiquityRobotics | 1 | 264 | 1 |
| Uberi | 5 | 8,614 | 16 |
| UZ-SLAMLab | 1 | 6,440 | 19 |
| UWKM | 1 | 33 | 0 |
| UU-cellbiology | 1 | 21 | 0 |
| UTNuclearRoboticsPublic | 1 | 15 | 0 |
| UTEL-UIUC | 1 | 30 | 0 |
| USCiLab | 1 | 4,179 | 9 |
| USCCANA | 1 | 85 | 0 |
| USArmyResearchLab | 1 | 5,446 | -1 |
| UPC | 1 | 543 | 0 |
| UPBGE | 1 | 1,424 | 4 |
| UMich-BipedLab | 1 | 249 | 0 |
| UL-FRI-LGM | 1 | 16 | 0 |
| UKPLab | 1 | 14,943 | 61 |
| UHH-ISS | 1 | 20 | 0 |
| UFreedom | 1 | 1,816 | 0 |
| UFAL-DSG | 3 | 292 | 0 |
| UDcide | 1 | 34 | 0 |
| UDST | 1 | 479 | 0 |