- u-boot
- u-boot-efi-dtb
- u-boot-menu
- u-config
- u-msgpack-python
- u1db-qt
- u2o
- u3-tool
- uacme
- uanytun
- uap-core
- uapevent
- uaputl
- ubelt
- uber-pom
- ubertooth
- ublock-origin
- ubuntu-dev-tools
- ubuntu-keyring
- ubuntu-packaging-guide
- uc-echo
- uc-micro-py
- ucarp
- ucblogo
- ucf
- uchardet
- uci2wb
- ucimf-chewing
- ucimf-openvanilla
- ucimf-sunpinyin
- ucl
- uclibc
- ucommon
- ucpp
- ucrpf1host
- ucspi-proxy
- ucspi-tcp
- ucspi-unix
- ucto
- uctodata
- ucx
- udevil
- udfclient
- udftools
- udiskie
- udisks2
- udisks2-qt5
- udm
- udns
- udo
- udpcast
- udpkg
- udptunnel
- udt
- udunits
- ueberzug
- uefitool
- ufiformat
- ufl
- ufo-core
- ufo-extractor
- ufo-filters
- ufo-tofu
- ufo2ft
- ufo2otf
- ufoai
- ufoai-data
- ufoai-maps
- ufoai-music
- ufolib2
- ufonormalizer
- ufoprocessor
- uftp
- uftrace
- ufw
- ugene
- uget
- uglify-js
- uglifyjs
- ugrep
- uhd
- uhttpmock
- uhttpmock0
- uhub
- uhubctl
- ui-auto
- ui-gxmlcpp
- ui-utilcpp
- uid-wrapper
- uif
- uim
- uim-chewing
- uima-addons
- uima-as
- uimaj
- uisp
- ujson
- ukopp
- ukui-app-widget
- ukui-biometric-auth
- ukui-biometric-manager
- ukui-bluetooth
- ukui-control-center
- ukui-greeter
- ukui-interface
- ukui-media
- ukui-menu
- ukui-menus
- ukui-notebook
- ukui-notification-daemon
- ukui-panel
- ukui-power-manager
- ukui-screensaver
- ukui-session-manager
- ukui-settings-daemon
- ukui-sidebar
- ukui-system-monitor
- ukui-themes
- ukui-wallpapers
- ukui-window-switch
- ukwm
- ulcc
- ulex
- ulex0.8
- ulfius
- ulogd2
- ultimateultimateguitar
- ultracopier
- ultraheat-api
- umap-learn
- umbrello
- umegaya
- umis
- uml-utilities
- umlet
- umoci
- umockdev
- umps3
- ums2net
- umtp-responder
- umview
- unac
- unace
- unadf
- unagi
- unalz
- unar
- unarr
- unattended-upgrades
- unbescape
- unbound
- unburden-home-dir
- uncalled
- uncertainties
- unclutter
- unclutter-xfixes
- uncommons-maths
- uncommons-watchmaker
- uncrustify
- undbx
- undercover-el
- underscore
- underscore.string
- undertime
- undertow
- undistract-me
- unearth
- unhide
- unhide.rb
- unhtml
- uni2ascii
- unibetacode
- unibilium
- unicap
- unicode
- unicode-cldr-core
- unicode-data
- unicode-idna
- unicode-rbnf
- unicode-screensaver
- unicode-segmentation-rs
- unicon
- unicorn
- unicorn-engine
- unicrypto
- unicycler
- unidecode
- unidic-mecab
- unifdef
- unifont
- unifrac
- unifrac-tools
- unikmer
- unilog
- unionfs-fuse
- unirest-java
- unison-2.51+4.11.1
- unison-2.51+4.13.1
- unison-2.52
- unison-2.53
- unit-translator
- units
- units-cpp
- units-filter
- unittest++
- unittest2
- unity-java
- uniutils
- universal-ctags
- universal-detector
- univocity-parsers
- unixcw
- unixodbc
- unknown-horizons
- unl0kr
- unmass
- unmo3
- unoconv
- unorm.js
- unp
- unpaper
- unrar-free
- unrtf
- unsafe-fences
- unsafe-mock
- unscd
- unshield
- unsort
- untex
- unuran
- unworkable
- unyaffs
- unyt
- unzip
- up-imapproxy
- upass
- upb
- update-inetd
- upgrade-system
- uphpmvault
- upower
- uprightdiff
- upse
- upstream-ontologist
- uptimed
- upx-ucl
- uranium
- urca
- urdfdom
- urdfdom-headers
- urfkill
- uriparser
- urjtag
- url-clojure
- url-normalize
- urlextractor
- urlscan
- urlview
- urlwatch
- uronode
- uruk
- urwid
- urwid-satext
- usagestats
- usb-discover
- usb-modeswitch
- usb-modeswitch-data
- usb.ids
- usbauth
- usbauth-notifier
- usbguard
- usbguard-notifier
- usbmonitor
- usbmuxctl
- usbmuxd
- usbredir
- usbrelay
- usbrip
- usbsdmux
- usbtop
- usbutils
- usbview
- use-package
- useful-clojure
- usemod-wiki
- usepackage
- user-agent-utils
- user-mode-linux
- user-mode-linux-doc
- user-session-migration
- user-setup
- userbindmount
- userinfo
- usermode
- userv
- userv-utils
- usgs
- usrmerge
- ussp-push
- ust
- ustr
- ustreamer
- utalk
- utf8-locale
- utf8.h
- utf8gen
- utf8proc
- utfcheck
- utfcpp
- utfout
- uthash
- utidylib
- util-linux
- utm
- utop
- utox
- uuagc
- uucp
- uucpsend
- uudeview
- uuidm
- uutf
- uvccapture
- uvloop
- uw-imap
- uwsgi
- uwsgi-apparmor
- uwsgi-plugin-gccgo
- uwsgi-plugin-glusterfs
- uwsgi-plugin-java
- uwsgi-plugin-lua
- uwsgi-plugin-luajit
- uwsgi-plugin-mongo
- uwsgi-plugin-php
- uwsgi-plugin-psgi
- uwsgi-plugin-pypy
- uwsgi-plugin-python
- uwsgi-plugin-rados
- uwsgi-plugin-ruby
- uxplay
- uzbek-wordlist