UER is a miscellaneous web resource for discovery, directories, archives, web culture, or useful tools.
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UFO Casebook is a public online resource focused on unidentified flying object (UFO) related content. The site hosts case files, photographs, video recordings, research documents, and user forum discussions related to UFO sightings, alleged alien contact, and associated historical and government records. It also features reports of recent UFO sighting incidents from 2025 and 2026.
UFO Evidence is a website presenting research, resources, news and information on the UFO phenomenon. It includes sections on selected UFO cases, photographs, sighting reports, and articles on topics related to the UFO and extraterrestrial phenomenon. The site describes itself as one of the largest internet sites on the subject.
uFreeTools is a miscellaneous web resource for discovery, directories, archives, web culture, or useful tools.
ugrep is a file pattern searcher presented as a compatible grep replacement. It searches archives and compressed files, binary files, and documents such as PDF and docx, and can output results as grep, JSON, XML or CSV. Installations are listed for macOS, Windows, Linux and BSD systems. The ug command offers optional configuration, while ugrep does not set default options.
Ugrep is a file pattern searcher designed as a user-friendly, faster alternative to grep. It includes a terminal user interface, Google-like Boolean search, fuzzy search, hexdumps, and can search nested archives, compressed files, PDFs, documents and other file types, hosted on GitHub.
UhuruPhotos is a gallery app for Android built with Jetpack Compose, SQLDelight and Coroutines using an MVI architecture. It supports viewing, backup and sync of media, plus search by keywords, faces or location and a photo map; the site states advanced features require a LibrePhotos server. It is in public beta on Google Play.
UI Colors is a design resource for UI work, graphics, templates, inspiration, or visual archives.
UI.com is a miscellaneous web resource for discovery, directories, archives, web culture, or useful tools.
Uji is a minimalist generative art tool. Users interact with buttons and sliders to create generative art. Drawings can be exported as PNG, JPEG, SVG (black line on transparent background, suitable for pen plotting), or JSON of line segment geometry. Shared links preserve configured art parameters, and an undo button restores previous work.
UK is a miscellaneous web resource for discovery, directories, archives, web culture, or useful tools.
Moving-image archive from UK Defence Imagery, providing classic and historical media for browsing and study.
A wiki for the /r/UKPersonalFinance subreddit and Discord. It offers a flowchart for getting finances in order, recommended books, videos and sites, guidance on where to get emergency money for essentials, and advice on posting questions to the subreddit.
The UK Solar System Data Centre provides a central archive and data centre facility for Solar System science in the UK, jointly funded by STFC and NERC. Its facilities include the World Data Centre for Solar-Terrestrial Physics, Chilton, and the Cluster Ground-Based Data Centre. It supports data archives encompassing solar, inter-planetary, magnetospheric, ionospheric and geomagnetic science.
A data archive from DEFRA UK Air offering measured air quality data and simple statistics. It covers monitoring data from over 1500 UK sites organised into automatic and non-automatic networks, descriptive statistics such as annual mean, maximum and minimum values, and exceedance statistics for concentrations above specific threshold values. Data can be downloaded using a Data Selector Tool or pre-formatted files.
Liveuamap is an independent global news and information site that reports on topics such as conflicts, human rights issues, protests, terrorism, weapons deployment, health matters, natural disasters and weather. It presents news through a map-centric approach and provides open online access to a chronological archive. It was founded in 2014 to inform about the Ukrainian conflict and later expanded to other regions.
Ulauncher is an application launcher for Linux. It performs fuzzy search that remembers previous picks and auto-selects the best option, and ships with four built-in themes with support for custom color themes. Personalized shortcuts and extensions provide quick access to scripts and searches, and a directory browser opens by typing ~ or /. Package instructions are listed for Ubuntu, Arch, Fedora, OpenSUSE and CentOS 7.
Ultimate Wheel is a miscellaneous web resource for discovery, directories, archives, web culture, or useful tools.
The UNAN-Managua Institutional Repository is the official institutional repository for UNAN-Managua. It offers browsing of content by year, subject, division, author and journal, advanced search functionality, and access to statistics, policies and self-archive services.
unblob is an extraction suite that parses unknown binary blobs for more than 30 archive, compression and file-system formats. It extracts content recursively and carves out unrecognized chunks. It is free under the MIT license, offers a command line interface and can be used as a Python library. It was developed and is maintained by ONEKEY.
Searches Reddit and public archives for removed posts, deleted comments, and moderated content.
Uncovered helps search books, ebooks, papers, library records, or reading archives.
Uncyclopedia is a content-free encyclopedia that any user can edit. Its English main page lists 140 active editors and 41,442 articles. The site provides community guidelines, help resources, and links to sister projects in other languages.
Unihedron helps find books, reading material, archives, or public-domain educational texts.