WhatUnit is a tool that helps users decide which CSS length unit to use. It presents a flowchart that can be panned by clicking and dragging and zoomed with ctrl/cmd plus mouse wheel.
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WhichJDK is a site giving independent recommendations on which version of the JDK to use. It notes that OpenJDK is the open source reference implementation of the Java SE specification, while binary distributions are provided by different vendors and differ in licenses, commercial support, supported platforms and update frequency. It recommends Adoptium Eclipse Temurin 25.
WhoCanUse is a tool that illustrates how color contrast affects people with different visual impairments. It grades color combinations against WCAG and shows how various vision conditions and situational events perceive the colors. Percentages for individual impairments are sourced from colour-blindness.com and Vision Australia.
whois is a developer resource for coding, documentation, communities, security research, or software tools.
Whois is a developer resource for coding, documentation, communities, security research, or software tools.
Whois is a GitHub repository or organization with source code, releases, documentation, or project resources.
WhoisRequest is a developer resource for coding, documentation, communities, security research, or software tools.
Wi is Fi provides educational videos, lessons, tutorials, or self-learning resources.
Widelands is a free, open source real-time strategy game with singleplayer campaigns and a multiplayer mode, inspired by Settlers II. It offers playable tutorials, and development builds are distributed for Windows, Mac OS and Linux, with a Flatpak package and Ubuntu PPA for Linux users.
Wiktionary provides educational videos, lessons, tutorials, or self-learning resources.
Winddown is a GitHub repository or organization with source code, releases, documentation, or project resources.
A Microsoft Learn design section that explains how to design Windows app experiences using Fluent Design principles, accessibility guidance, layout patterns, motion and visual styles. It provides guidance on color, materials, typography, icons, navigation and usability.
WindowsCustomization.com is a resource for enhancing the appearance of Windows computers. It offers tutorials, themes, icons, wallpapers, Rainmeter skins, cursors, and tools such as RocketDock and Wallpaper Engine. The site includes guidance on using SecureUxTheme and UxThemePatcher, and warns users to match themes with their Windows version. Although many broken links have been removed, the site remains a guide for customizing the Windows interface.
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.
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.
WireMock Cloud is environment simulation infrastructure for agents and applications. It provides stateful API simulations that update with each commit and run on laptops, in CI, and in clusters, with on-demand latency, errors, outages and edge cases. Simulations can be created as code, through a collaborative cloud UI, or agentically.
Wolfram Cloud provides educational videos, lessons, tutorials, or self-learning resources.
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.
WordReference provides educational videos, lessons, tutorials, or self-learning resources.
Workflow Index is a GitHub repository or organization with source code, releases, documentation, or project resources.
WOW! eBook is a site for free download of online PDF eBooks, magazines and video tutorials. Listed titles include technology and software development books with paperback page counts, publication dates and ISBNs.
wsrv.nl is a developer resource for coding, documentation, communities, security research, or software tools.
wtfis is a GitHub repository or organization with source code, releases, documentation, or project resources.
X-Force Exchange is a developer resource for coding, documentation, communities, security research, or software tools.