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The Wine Application Database (AppDB) provides information on application compatibility with Wine, open source software for running Windows applications on other operating systems. The database lists applications with compatibility information, and membership allows voting on applications, submitting applications and screenshots, and serving as an application maintainer.
WinMerge is an open-source differencing and merging tool for Windows. It compares folders and files, presenting differences in a visual text format, and is useful for determining what has changed between project versions and merging changes. It can be used as a standalone application or as an external differencing/merging tool.
News and web search site for browsing headlines, links, and topic pages from online sources.
Wireflow is a free, online and open source tool for creating user flow prototypes without Photoshop skills. It offers 125 ready-made wireframe screen templates, groups and notes, and export to PNG or JPG. The project is MIT licensed and runs in the browser.
A rentry guide explaining how to use Cloudflare's WARP through WireGuard instead of Cloudflare's closed-source application. It describes creating a WARP account with wgcf, generating a profile, importing it into WireGuard, and offers tips for Android-TV and Linux setups.
wkhtmltopdf and wkhtmltoimage are open source command line tools that render HTML into PDF and image formats using the Qt WebKit rendering engine. They run headless without a display or display service. A C library, libwkhtmltox, offers bindings for PDF and image conversion.
wnr is a free and open-source time-management tool for Windows, macOS and Linux. It provides a timer with a fullscreen focus mode that makes rest mandatory and blocks virtual desktops and every monitor until a session ends. Options include disabling cancelling, skipping or stopping, parent control, statistics, mini mode and predefined tasks.
Women Writers in Review is a digital collection published by the Women Writers Project at Northeastern University, created as part of the Cultures of Reception initiative. It aggregates eighteenth- and nineteenth-century reviews, publication notices, literary histories, and other texts that respond to works by early women writers, and offers tools to explore content by authors, works, sources, and tags, plus filtering facets.
The Woods Hole Oceanographic Institution Data & Repositories page provides access to various online data sources produced by WHOI researchers. It lists supported data resources including the WHOI Data Library and Archives, Woods Hole Open Access Server, Martha’s Vineyard Coastal Observatory, Seafloor Sediments Data Collection, Alvin Frame-Grabber, Jason Virtual Control Van, Sealog, and project-based WHOI data.
WordCount is a web tool that displays the frequency of words, names, and functions in Linux kernel source code. Users can browse example counts or submit comma-separated custom word lists to retrieve frequency results. The tool supports wildcard (*) searches and combined term sums using the foo|bar syntax, with words defined by backslash while ignoring case and accents. Interactive graphs are available for users with JavaScript enabled, while non-JavaScript users see an outdated static PNG version. The page creator also hosts other recreational content.
WordPress is an open-source blog tool, publishing platform, and content management system. It can be used to build websites, blogs, or applications. The platform is used by millions of websites globally, ranging from individual creators and small businesses to large enterprises, and offers tools for design, content building, and extension via plugins, themes, and community resources.
World Monitor is a free, open-source global intelligence dashboard that streams live data feeds onto a single world map with AI analysis. It covers conflict events, military flights, ship movements, market data, shipping chokepoints, internet outages and cyber signals, and provides a REST API with MCP equivalents.
World-Newspapers is an annotated directory of newspapers, magazines and news sites in English, sorted by country and region. The site was started in 2002 and provides links to news sources covering countries and many subjects. Descriptions and selection of sites are based on the operators' personal opinion.
WorldData.AI is a data platform that aggregates curated data from public sources. It combines datasets, news analysis and location-based data in a single search interface. The site lists a free trial plan with 8000 credits per month, limited access to Global Data, News AI and Geo Intelligence, and a bulk download limit of 250 datasets.
The Worldwide Governance Indicators are annual composite indicators summarizing six dimensions of governance across more than 200 economies, based on perception data from 35 cross-country sources. The World Bank publishes the 2026 update, with data covering 1996 to 2025. The indicators are intended for research, policy analysis and government reflection, not as definitive criteria for credit ratings or investment risk.
WriteFreely is an open source, self-hosted blogging platform built around minimalist writing. It offers a distraction-free editor, Markdown formatting and federation via ActivityPub, and it can host a community of writers on a multi-user instance. It is written in Go.
x64dbg is an open-source debugger for Windows that supports both x64 and x32 applications through a single interface. It offers full-featured debugging of DLL and EXE files, a plugin API, an integrated scripting language and customizable themes.
Xabber is an open-source XMPP client for Android and the Web, licensed under GPLv3. It supports multiple XMPP accounts, dynamic history loading, media sharing, and end-to-end encryption, with synchronization across connected devices. Xabber for Web runs in any platform with a modern browser.
XAMPP is a free, open source Apache distribution that bundles MariaDB, PHP, and Perl. It is presented as an easy-to-install PHP development environment, with installers available for Windows, Linux, and OS X.
Xapian is an open source search engine library released under the GPL v2+ and written in C++, with bindings that allow use from Perl, Python, PHP, Java, Ruby and other languages. It is a toolkit that lets developers add indexing and search facilities to their own applications, with built-in support for multiple weighting model families and boolean query operators. Omega is a supplied search application built on Xapian.
Xournal++ is an open-source, cross-platform note-taking software, described as a feature-rich modern rewrite of the original Xournal program. It is available for MacOS, Windows, and Linux. The app supports handwritten note-taking with pressure-sensitive styluses and drawing tablets, offers customizable pen, highlighter and eraser tools, includes layers for complex notes, page previews, and supports adding images and various shapes for scientific and general note use.
Xtreme Download Manager is a free, open-source download manager for Windows, macOS and Linux. It uses segmented downloading to accelerate transfers, resumes broken downloads, saves streaming video and supports batch downloads. It works with several browsers and offers a scheduler and speed limiter.
Yangshun is a miscellaneous web resource for discovery, directories, archives, web culture, or useful tools.
YARG (Yet Another Rhythm Game) is a free, open-source, community-driven PlasticBand game. It supports most instruments from classic games, including Guitar, Bass, Drums, Keys and Vocals. Local multiplayer supports up to 32 players. Its official setlist has over 100 licensed songs, and full albums are available on the YARC Launcher.
