| U Win | 1 | 1 |
| U-Blox | 5 | 5 |
| U-Root | 1 | 3 |
| U-Tec | 1 | 1 |
| U.S.Robotics | 1 | 1 |
| Ua-Parser Project | 1 | 1 |
| Ua-Parser-Js Project | 1 | 5 |
| Uacinemas | 1 | 1 |
| Uaepd | 1 | 1 |
| Ualberta | 1 | 1 |
| Uangel | 1 | 1 |
| Uanw | 1 | 1 |
| Uap-Core Project | 1 | 2 |
| Uaparser | 1 | 1 |
| Uapp | 1 | 4 |
| Uapplication | 4 | 10 |
| Uatech | 1 | 7 |
| Ubbcentral | 1 | 20 |
| Ubeeinteractive | 8 | 8 |
| Uber | 2 | 2 |
| Uber Uploader | 1 | 2 |
| Ubercart | 1 | 12 |
| Ubercart Currency Conversion Project | 1 | 1 |
| Ubercart Discount Coupons Project | 1 | 1 |
| Ubercart Views Project | 1 | 2 |
| Ubercart Webform Checkout Pane Project | 1 | 1 |
| Ubercart Webform Integration Project | 1 | 1 |
| Uberghey | 1 | 1 |
| Ubermedia | 2 | 2 |
| Uberrider | 1 | 1 |
| Ubertec | 1 | 7 |
| Ubertidavide | 1 | 1 |
| Ubi | 2 | 3 |
| Ubi Reader Project | 1 | 2 |
| Ubi Soft | 1 | 1 |
| Ubigeo De Peru Para Woocommerce Project | 1 | 1 |
| Ubikasec | 2 | 2 |
| Ubilling | 1 | 2 |
| Ubiou | 1 | 1 |
| Ubiquiti Networks | 1 | 1 |
| Ubiquity Slideshow Team | 1 | 1 |
| Ubiquoss | 1 | 1 |
| Ubisoft | 1 | 2 |
| Ubit | 1 | 2 |
| Ublasti Project | 1 | 1 |
| Ublock Origin Project | 1 | 1 |
| Ublockorigin | 1 | 2 |
| Ublog | 1 | 1 |
| Ubnt | 6 | 8 |
| Ubooly | 1 | 1 |
| Ubports | 2 | 4 |
| Ubuntu | 14 | 92 |
| Ubuntu Developers | 2 | 2 |
| Ubuntubudgie | 1 | 6 |
| Ubuntukylin | 2 | 3 |
| Uc Profile Project | 1 | 1 |
| Ucbrise | 1 | 1 |
| Ucd-Snmp | 1 | 3 |
| Ucdok | 1 | 1 |
| Ucf | 1 | 1 |
| Uchida | 1 | 1 |
| Uclibc | 1 | 6 |
| Uclibc-Ng Project | 1 | 7 |
| Uclouvain | 1 | 77 |
| Ucms Project | 1 | 28 |
| Ucoincorp | 1 | 1 |
| Ucointoken Project | 1 | 1 |
| Ucontrol | 1 | 1 |
| Ucopia | 3 | 9 |
| Ucweb | 4 | 8 |
| Udecode | 1 | 3 |
| Udesign Project | 1 | 1 |
| Udev Project | 1 | 4 |
| Udisks Project | 1 | 2 |
| Udo Von Eynern | 1 | 1 |
| Udx | 1 | 1 |
| Ueberhamm-Design | 1 | 1 |
| Ueberproject Management System | 1 | 1 |
| Uebimiau | 2 | 11 |
| Uekw1511Server Project | 1 | 1 |
| Uetoken | 1 | 1 |
| Ufactory | 4 | 5 |
| Uffizio | 1 | 5 |
| Ufku Bayburt | 1 | 1 |
| Uflo Project | 1 | 1 |
| Ufmod | 1 | 1 |
| Ufo2000 | 1 | 5 |
| Uglifyjs Project | 1 | 3 |
| Ugroup | 1 | 1 |
| Ugtoken Project | 1 | 1 |
| Uhcu | 1 | 1 |
| Uhp | 1 | 2 |
| Ui | 74 | 143 |
| Uidai | 1 | 1 |
| Uiga | 5 | 11 |
| Uim | 1 | 2 |
| Uip Project | 1 | 7 |
| Uipath | 3 | 5 |
| Uipress | 1 | 1 |
| Uitv | 1 | 1 |
