Typst is a document system developed in the open with a community, where the compiler is open source. Content is written as markup focused on structure, with formatting done automatically, and documents can be exported as a PDF, image, or website in preview. It supports visualizations, mathematics, plots, tables, code, bibliographies, and slides.
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The U.S. Energy Information Administration is the official source of U.S. government energy statistics. It publishes data and analysis on petroleum, natural gas, electricity, coal, nuclear, uranium and renewable fuels, along with state and international energy information and short- and long-term forecasts. It also offers open data as an API, Excel add-in and bulk files.
U.Today is a crypto media or research source for news, analysis, and blockchain market updates.
Übersicht is a free, open-source macOS app that runs system commands and displays their output on the desktop in widgets. Widgets are written with HTML5, can show data in tables, charts and graphs, and can react to different screen sizes. Widgets use JavaScript and React's JSX.
UBG365 is a site offering a collection of free-to-play games sourced from across the internet. It is aimed at students and office workers wanting relaxing moments during breaks, including in restricted environments. The site states it is constantly updated and accepts game requests by email or links on the site. A live search box helps find games by keyword.
Ui.Vision RPA is an open-source browser and desktop automation tool for building reusable macros. It offers web automation, desktop automation, web scraping, UI testing and test automation, using visual recording, Selenium-style commands or a JavaScript API. The V10 release adds an AI macro assistant and an MCP bridge for connecting AI assistants. The browser extension is available for Chrome, Edge and Firefox.
UK-OSINT is a training and resource website covering open source intelligence and Internet Intelligence & Investigations. It states that commercial training is no longer offered, while presentations on OSINT and online research are available to conferences, events and investigation groups.
The Ulster University Research Portal provides a comprehensive source of information on all aspects of the University's research activity, giving instant access to research information and allowing researchers to showcase research talent and achievements. Collaborators can search the portal by names or keywords to explore expertise within Ulster University.
UltiMaker Cura is free 3D printing and slicing software. It offers an open-source slicing engine with more than 400 customizable settings for adjusting 3D models and printing results. The software is available for download, and previous versions can be found on the site.
Ultimate Cheatsheet is a GitHub Gist created by user bgoonz. It contains a markdown file titled Ultimate-Cheatsheet.md that presents an ultimate resource list. Gists are used to share code, notes, and snippets. The gist was last active on September 20, 2026.
uMap is a free and open-source online map creator maintained by a community of contributors. It lets users build custom maps using OpenStreetMap background layers, draw lines and polygons, import information layers, and embed maps on websites. A graphical interface allows creating interactive maps without coding, and additional features include heatmaps, clustering and slideshows, without requiring an account.
UMLet is a free, open-source UML tool with a simple user interface for drawing UML diagrams. Sequence and activity diagrams can be created from plain text, and diagrams can be exported to eps, pdf, jpg, svg and the clipboard. It is available as a stand-alone app for Windows, macOS and Linux, as an Eclipse plugin, as the UMLetino web app and as a Visual Studio Code extension.
unDraw presents a collection of open-source illustrations that users can browse and download, with on-the-fly color image generation to match a brand identity. A separate style is offered on unDraw Plus for supporters.
UniClipboard is an open-source tool that syncs the system clipboard across Mac, Windows, Linux, iPhone, and Android. Content is end-to-end encrypted with XChaCha20-Poly1305, and the relay only sees ciphertext. It requires no cloud account, and devices pair by exchanging a public key. A Quick Panel, local full-text search, and a command-line interface are included.
UniGetUI is a graphical interface for Windows package managers, combining packages from WinGet, Scoop, Snap, Chocolatey, Pip, Npm, .NET Tool and PowerShell Gallery. It allows installing, updating and uninstalling software without the command line, along with package discovery and filtering, bulk operations, and exporting and importing package lists between machines. It is free and open source under the MIT license.
UniKey is a Vietnamese keyboard and input method developed by Phạm Kim Long, first released in 1999. Its UniKey Input Engine handles Vietnamese processing and is open source under the GNU General Public License; the engine has been used in default keyboard programs on Linux, macOS and iOS. The software runs on Windows, Linux, macOS and iOS.
UniqueStream is a streaming website with a mobile app that lists movies and television shows, including trending titles and new releases. A help center covers account creation, sign-in, password reset, video playback, quality and subtitle settings, watchlists and troubleshooting. Playback issues are addressed by switching the streaming source or enabling Data Saver.
UniSat is an open-source Bitcoin browser extension wallet with tools for minting, trading, exploring and managing assets. It supports Ordinals, Runes and Alkanes, and the site also links to its ecosystem products UniScan, an explorer, and UniHexa, a liquidity market for Bitcoin-native assets.
The University of Idaho offers undergraduate and graduate programs across more than 200 areas of study. The source describes scholarships, financial aid, admission requirements, housing and dining options. It states that U of I is Idaho's Carnegie R1 research university and describes its Moscow campus and online classes.
The University of Iowa is a public university with more than 200 areas of study, located in Iowa City. The source lists information on areas of study, cost and aid, and a virtual tour. It names the institution as a Big Ten athletics member with a medical center.
Unminus is a source for curated royalty free music intended for videos, games, apps, podcasts, YouTube and events. Visitors can play or download the music, which is organized by genre, mood and tempo. The site states there are no rules and no ads.
UnrealIRCd is an open source IRC server serving thousands of IRC networks since 1999. It runs on Linux, FreeBSD, NetBSD, macOS and Windows and features module support, IRCv3 support, SSL/TLS, anti-flood and anti-spam systems, and GeoIP lookups.
Unsloth Studio is an open-source, no-code web UI for training, running and exporting open models in one local interface. It supports GGUF, MLX and diffusion image/video models on Mac, Windows and Linux, and runs AI models offline without a GPU. A graphical Data Recipes workflow creates synthetic datasets from uploaded files.
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