| Urusoft | 1 | 1 |
| Urvanov | 1 | 1 |
| Urve | 1 | 3 |
| Usaa | 2 | 2 |
| Usabilitydynamics | 2 | 8 |
| Usagi | 1 | 2 |
| Usanet Creations | 6 | 7 |
| Usavisionsys | 5 | 10 |
| Usb Pratirodh Project | 1 | 2 |
| Usb-Creator Project | 1 | 1 |
| Usbank | 1 | 1 |
| Usbguard Project | 1 | 1 |
| Usbmemorydirect | 1 | 1 |
| Usbpcap Project | 1 | 1 |
| Usbview Project | 1 | 1 |
| Usc | 1 | 2 |
| Uscat Project | 1 | 2 |
| Use Any Font Project | 1 | 1 |
| Useasdf 4444 | 1 | 1 |
| Usebb | 1 | 10 |
| Usebottles | 1 | 1 |
| Usedesk | 1 | 3 |
| Useful Banner Manager Project | 1 | 1 |
| Useful Simple Open-Source Cms Project | 1 | 3 |
| Usememos | 1 | 62 |
| User Access Manager Project | 1 | 1 |
| User Activity Project | 1 | 1 |
| User Dashboard Project | 1 | 1 |
| User Domain Whitelist Project | 1 | 2 |
| User Home Pages | 1 | 1 |
| User Import Project | 1 | 1 |
| User Location And Ip Project | 1 | 1 |
| User Management System In Php Stored Procedure Project | 1 | 1 |
| User Meta Manager Project | 1 | 1 |
| User Meta Shortcodes Project | 1 | 1 |
| User Photo | 1 | 1 |
| User Photo Project | 1 | 1 |
| User Project | 1 | 1 |
| User Read-Only Project | 1 | 1 |
| User Registration & Login And User Management System Project | 1 | 3 |
| User Registration & Login And User Management System With Admin Panel Project | 1 | 6 |
| User Registration & User Management System Project | 1 | 1 |
| User Relationships Project | 1 | 1 |
| User-Activation-Email Project | 1 | 1 |
| User-Agent Switcher And Manager Project | 1 | 1 |
| User-Login-History Project | 1 | 1 |
| User-Meta | 2 | 21 |
| User-Mode Linux | 1 | 1 |
| Useragent Project | 1 | 1 |
| Useragent-Spy Project | 1 | 1 |
| Userback | 1 | 1 |
| Userbox Project | 1 | 1 |
| Usercake | 1 | 1 |
| Userfeedback | 1 | 2 |
| Userfriendlymedia | 2 | 2 |
| Userfrosting | 1 | 1 |
| Userland | 1 | 2 |
| Userlike | 1 | 1 |
| Userlocal | 1 | 1 |
| Usermin | 1 | 13 |
| Userprivatefiles | 1 | 2 |
| Userproplugin | 2 | 17 |
| Userscape | 1 | 2 |
| Usersnap | 1 | 1 |
| Usersultra | 3 | 7 |
| Usertask Center Messaging Project | 1 | 1 |
| Userver | 1 | 1 |
| Userwallet Project | 1 | 1 |
| Usestrict | 1 | 1 |
| Usfbcm | 1 | 1 |
| Ushahidi | 2 | 11 |
| Ushainformatique | 1 | 1 |
| Ushareit | 1 | 4 |
| Usolved | 2 | 2 |
| Usr | 5 | 6 |
| Usriot | 4 | 4 |
| Usrsctp Project | 1 | 1 |
| Ussun | 2 | 2 |
| Usta | 1 | 1 |
| Usu | 1 | 4 |
| Usualtool | 1 | 3 |
| Usvn | 2 | 7 |
| Ut-Files | 1 | 2 |
| Utage.Org | 1 | 1 |
| Utahcityfinder Project | 1 | 1 |
| Utarit | 2 | 3 |
| Utbtokentest Project | 1 | 1 |
| Utc | 1 | 1 |
| Utct Project | 1 | 1 |
| Utempter | 1 | 1 |
| Uthscsa | 2 | 2 |
| Util-Linux Project | 1 | 4 |
| Utilities Project | 1 | 1 |
| Utilo | 1 | 1 |
| Utils Project | 1 | 1 |
| Utils-Extend Project | 1 | 1 |
| Utils.Js Project | 1 | 1 |
| Utimaco | 8 | 8 |
| Utimf | 1 | 1 |
| Utm Tracker Project | 1 | 1 |
