| Name | Repositories | Stars | Stars this week |
|---|---|---|---|
| UbiquityRobotics | 1 | 265 | 1 |
| UchihaL | 1 | 42 | 1 |
| UglyTroLL | 1 | 37 | 0 |
| Uhlo | 1 | 7 | 0 |
| UlionTse | 1 | 1,638 | 1 |
| Ullaakut | 1 | 4,061 | 6 |
| Ullink | 1 | 470 | 0 |
| Ultimaker | 1 | 6,106 | 12 |
| UltimateHackers | 6 | 31,676 | 54 |
| Ultimator14 | 2 | 0 | 0 |
| Ulydev | 4 | 683 | 1 |
| UlyssesZh | 1 | 0 | 0 |
| Uncommon | 1 | 992 | -1 |
| UnderGreen | 1 | 343 | 0 |
| UnderstandLingBV | 1 | 60 | 0 |
| UnexpectedMaker | 1 | 13 | 0 |
| UnfortuN8 | 1 | 3 | 0 |
| UngeUI | 1 | 54 | 0 |
| UniMath | 1 | 954 | 0 |
| UnicornGlobal | 1 | 32 | 1 |
| Unidata | 1 | 238 | 1 |
| Uninen | 1 | 13 | 0 |
| UnionInternationalCheminsdeFer | 1 | 57 | 1 |
| Unitech | 1 | 41,396 | 14 |
| Unity-Technologies | 3 | 14,485 | 18 |
| UniversalAvenue | 1 | 22 | 0 |
| UniversalDataTool | 1 | 1,943 | 0 |
| UniversalRobots | 1 | 408 | 3 |
| UnixJunkie | 4 | 132 | 0 |
| UnkL4b | 1 | 2,090 | 4 |
| Unleash | 2 | 11,144 | 38 |
| UnlockedData | 2 | 11 | 0 |
| UnlyEd | 2 | 1,355 | 1 |
| UnnoTed | 1 | 634 | 0 |
| UnrealAkama | 1 | 119 | 0 |
| Unrud | 1 | 519 | 5 |
| Unvanquished | 1 | 976 | 1 |
| UnwrittenFun | 1 | 47 | 0 |
| UrbanCompass | 2 | 253 | 0 |
| Urigo | 7 | 10,320 | 5 |
| UseMuffin | 9 | 443 | 0 |
| Usnul | 1 | 256 | 1 |
| UweRaabe | 1 | 41 | 0 |
| V2AI | 1 | 1,496 | 0 |
| VCNC | 1 | 158 | 0 |
| VDVde | 1 | 22 | 0 |
| VGamezz19 | 1 | 2 | 0 |
| VGraupera | 1 | 9,527 | 6 |
| VLtim43 | 1 | 0 | 0 |
| VMadalin | 1 | 2,412 | 0 |