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shorteners.grayhatwarfare.com
URL Shorteners Search, hosted at shorteners.grayhatwarfare.com, is a search tool for indexed shortened URLs. It indexes 1.1 billion URLs from 3.6 billion domains, with updates as recent as 06 November 2025. The service provides a public API for searching, fetching, filtering, and sorting shortener URLs and domains, with free registered and premium user tiers. A scrolling API for bulk result fetching is available to Enterprise package users.
url-decode.com
URL Decoder is a tool by url-decode.com that decodes percent-encoded URLs into readable URLs. It uses a two-panel interface, supports decoding multiple URLs separately, and allows uploading text files. Results can be copied or downloaded. It also provides an encode function and explains why URL encoding and decoding are necessary.
urlcleaner.net
URLCleaner is a privacy tool for blocking ads, trackers, popups, proxies, or unwanted web behavior.
urlvoid.com
URLVoid is a free website reputation checker. It scans a website against multiple reputation and blocklist services to help determine whether it is safe or malicious, and provides a safety report with blocklist names and IP and domain details.
urtempmail.com
UrTempMail provides temporary or disposable email addresses for quick signups and inbox testing.
perchance.org
Urv AI Chat is an AI chat or model resource for writing, coding, research, prompts, and assistant workflows.
acleddata.com
ACLED crisis monitor mapping protests, political violence, and social unrest across the United States.
The Interactive Data Application from the U.S. Bureau of Economic Analysis provides access to BEA statistics, including national, international, regional and industry data. It organizes data by account and topic and offers printing, saving, exporting and charting, with data sharing via social tools. Data is updated in near real time.
usjgofs.whoi.edu
The U.S. Joint Global Ocean Flux Study (U.S. JGOFS) was a national component of international JGOFS, launched in the late 1980s to study the ocean carbon cycle. Its goal was to understand the controls on the concentrations and fluxes of carbon and associated nutrients in the ocean. The program ended in 2005 with the conclusion of the Synthesis and Modeling Project (SMP).
karpathy.ai
A research tool that visualizes 342 occupations from the Bureau of Labor Statistics Occupational Outlook Handbook, covering 143M US jobs. Rectangle area is proportional to employment, and color shows a selectable metric such as BLS projected growth outlook, median pay, education requirements, or AI exposure. Clicking a tile opens its BLS page.
archives.gov
The U.S. National Archives website presents the Charters of Freedom, including the Declaration of Independence, Constitution and Bill of Rights, and provides transcripts of these documents. It also lists news, exhibitions and upcoming events from the National Archives and Records Administration.
Provides fictional US identity number generators for testing forms and software applications.
usaco.guide
The USACO Guide is a free collection of curated competitive programming resources intended to take contestants from USACO Bronze to USACO Platinum and beyond. It includes modules, extensive problemsets, progress tracking and a forum, and the guide states it is not an official syllabus.
open-vsx.org
Usage Tracker supports software development with code generation, analysis, debugging, or documentation.
yumemi.moe
Usagi is a multilingual open source manga reader for Android, described as simple and convenient and made from and for the community. It uses plugin-based sources and a customizable interface, and lists new display and arrangement modes and a backdrop image among its features. The project is GPL-3.0 licensed.
digitallibrary.usc.edu
The USC Digital Library is the digital library of the University of Southern California. It provides access to rare and archival materials including photographs, maps, manuscripts, and recordings from USC and partner institutions, and hosts collections across a range of academic subject areas.
usd.ai
USD.AI provides non-dilutive GPU loans for GPU cloud operators and GPU-backed credit for institutional capital, scored on one standard. It originates and underwrites loans, with CHIP holders setting the standards that price and secure them.
gist.github.com
Useful Embed Index is a code project with source, releases, documentation, or setup notes.
trolologuy.github.io
A curated list of tools and programs for developers, devops, admins, and others, organized into categories such as architecture and diagrams, API development, and backup and archiving. Most listed items are open source, though not all, and the page advises checking applicable licences. The project is hosted on GitHub.
useful-forks.github.io
Useful Forks is a web-based tool that helps users find useful forks of GitHub projects. It uses the GitHub API to retrieve repository metadata. Users can provide a personal GitHub Access Token stored in local browser storage to increase the API rate limit by nearly 5000 calls per hour. The tool allows configuration of the relative repository for commit diff calculations, with the default set to parent, and supports exporting scan results as CSV files.
usenet.rexum.space
A page that presents Usenet deals, discounts and promotional offers from Usenet providers, with a comparison of pricing and features. Deal content loads dynamically, so the listings themselves are not present in the saved page.
webextension.org
A browser extension that modifies the browser's User-Agent string, related Client Hints headers and the navigator.userAgentData object. It can apply custom or randomized User-Agent strings per tab or hostname and deactivates when the default string is used.
userstyles.world
UserStyles.world is a free and open-source, community-driven platform for sharing and browsing UserCSS userstyles, described as a replacement for UserStyles.org. It offers tracker-free browsing, Stylus integration for publishing updates, and mirroring of userstyles from other places including the USo-archive. It is licensed under AGPLv3.