| Uk-cookie Project | 1 | 2 |
| Ukbusinessaid | 1 | 1 |
| Ukcms | 1 | 4 |
| Ukiweb | 1 | 1 |
| Ukranian National Antivirus | 1 | 3 |
| Ukrsolution | 1 | 1 |
| Ulaunchelf | 1 | 1 |
| Ulaunchelf Project | 1 | 1 |
| Uleak-security-dashboard Project | 1 | 1 |
| Ulefone | 2 | 2 |
| Ulfius Project | 1 | 1 |
| Ulicms | 1 | 3 |
| Ulikunitz | 1 | 5 |
| Ulli Horlacher | 1 | 6 |
| Uloki | 1 | 1 |
| Ulrich Callmeier | 1 | 1 |
| Ulrik Petersen | 2 | 4 |
| Ulrikstrid | 1 | 1 |
| Ulteo | 1 | 2 |
| Ulterius | 1 | 1 |
| Ultimaker | 6 | 12 |
| Ultimate Auction | 1 | 1 |
| Ultimate Fun Book | 1 | 1 |
| Ultimate Helpdesk | 1 | 2 |
| Ultimate Instagram Feed Project | 1 | 1 |
| Ultimate Member | 2 | 37 |
| Ultimate Nofollow Project | 1 | 1 |
| Ultimate Php Board | 1 | 21 |
| Ultimate Php Board Project | 1 | 21 |
| Ultimate Target-armored Sniper Project | 1 | 1 |
| Ultimate Woocommerce Csv Importer Project | 1 | 1 |
| Ultimate-weather Project | 1 | 1 |
| Ultimatecoin Project | 1 | 1 |
| Ultimatefosters | 1 | 1 |
| Ultimatekode | 1 | 1 |
| Ultimatemember | 7 | 62 |
| Ultimatesmsnotifications | 1 | 1 |
| Ultimatevideosite | 1 | 1 |
| Ultra Shareware | 1 | 2 |
| Ultra-prod | 1 | 1 |
| Ultraapps | 1 | 1 |
| Ultradefrag | 1 | 1 |
| Ultraedit | 2 | 4 |
| Ultrafunk | 1 | 4 |
| Ultrajson | 1 | 3 |
| Ultrajson Project | 1 | 3 |
| Ultramagnetic | 1 | 3 |
| Ultraplayer | 1 | 1 |
| Ultrapop | 1 | 4 |
| Ultrascripts | 1 | 3 |
| Ultrashareware | 1 | 2 |
| Ultrasite | 1 | 1 |
| Ultrastats | 1 | 2 |
| Ultravnc | 5 | 56 |
| Ultrix | 1 | 1 |
| Ultrize | 2 | 7 |
| Ulyssesonline | 1 | 1 |
| Umanni | 1 | 14 |
| Umarbajwa | 1 | 2 |
| Umask Project | 1 | 1 |
| Umatrix Project | 1 | 1 |
| Umberto Caldera | 1 | 2 |
| Umbraco | 6 | 52 |
| Umbraengineering | 2 | 2 |
| Umbral Project | 1 | 1 |
| Umerinc | 1 | 1 |
| Umi-cms | 2 | 2 |
| Umich | 2 | 2 |
| Uml-utilities | 1 | 1 |
| Umlaeute | 1 | 1 |
| Umlet | 1 | 1 |
| Ummmmm | 1 | 1 |
| Umn | 1 | 21 |
| Umount Project | 1 | 1 |
| Umplayer | 1 | 1 |
| Umplayer Project | 1 | 1 |
| Umut Gokbayrak | 1 | 1 |
| Un4seen | 3 | 5 |
| UnFocus Projects | 1 | 1 |
| Una | 1 | 3 |
| Unadf Project | 1 | 2 |
| Unak | 2 | 4 |
| Unalz | 1 | 2 |
| Unbit | 1 | 3 |
| Unbound | 1 | 32 |
| Unboxinteractive | 1 | 1 |
| Uncannyowl | 2 | 2 |
| Unclassified | 1 | 2 |
| Unclassified Newsboard | 1 | 6 |
| Unconfirmed Project | 1 | 1 |
| Unctad | 1 | 1 |
| Uncurl Project | 1 | 1 |
| Undefsafe Project | 1 | 1 |
| Under Construction Baby | 1 | 1 |
| Underbit | 3 | 10 |
| Underconstruction Project | 1 | 5 |
| Underscore-99xp Project | 1 | 1 |
| Underscorejs | 1 | 1 |
| Undertow-io | 1 | 35 |
| Undolog | 2 | 2 |
