- U of I Law Library Check-Out
- U.S. Military Cadences Audio
- U.S. Military Cadences — Army, Navy, Air Force, & Marine Corps
- U.S. Presidents Facts & Myths!
- U.S. State Capitals! States & Capital Quiz Game
- U1대학교 도서관
- UAE-Laws
- UAlberta Library Checkout
- UB Libraries
- Ubook: Audiobooks e Podcasts
- Ubook Go
- Ubooks
- UBSM
- Ubuntu African Proverbs
- UC Davis Meescan
- UC Self-Checkout
- UCA School Kuwait
- UCalgary Library Self Checkout
- UCAV Biblioteca
- UdaLibrary
- Udayavani ePaper
- UEH Library
- Ugglan & Musen 1
- Ugglan & Musen 2
- Ughy István
- Ugly Duckling - Interactive Book iBigToy
- Ugly Duckling - iBigToy
- UHLS Mobile App
- UIC Library
- UJ Library Checkout
- UK and US English Vocabulary
- UK Tamil Ecclesia
- UK Travel Guide
- UK-Little Monster at School
- UK-Tortoise and the Hare
- Ukrainian−English dictionary
- UK-Tortoise and the Hare
- Ukrainian−English dictionary
- Ukrainian Bible - Bible2all
- Ukrainian Bible for iPad
- Ukrainian Bible Offline
- Ukrainian Holy Bible
- Ukranian bible
- Ukranian Bible Offline
- Uksumuuq!
- Ultimate Guide for Terraria Pro - Tips and cheats for Terraria
- Ultimate War - Great Strategy TD Game
- Umanistici
- Umbalena - Đọc sách thỏa thích
- Umizaru -Japanese Comics-
- UMLibraries Self-Checkout
- UMPSA ADAB
- Un amico crock!ante