Icon Shelf is a free and open source icon manager for web developers. It connects to a web project's assets folder and does not add extra files to it. Icons can be organized by collections, previewed, and searched, and copied as import statements for frameworks including React, Vue, Svelte and Ember. It runs on macOS, Windows and Linux.
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JavaDecompiler provides an online interface for extracting source code from .class and .jar binary files. It presents several Java decompilers, including CFR, JD, Procyon, Fernflower and JAD, with notes on each. The site also links to an APK decompiler and a knowledge base. JAD is listed for historical reasons only.
Joomla! is a free and open source content management system used to build, organize, manage and publish content for websites, blogs, intranets and mobile applications. The site lists benefits including search engine friendly and mobile friendly output, multilingual support, unlimited design, multi-user permission levels and extensibility, along with thousands of free extensions and templates.
JSON Hero is a web-based JSON viewer that presents JSON files in a UI with extra features. It infers what strings represent, such as images, dates, colors, URLs and videos, shows related values for fields, and generates an inferred JSON schema. It supports searching the whole file and sharing documents, and is open source.
Lazarus is an open-source cross-platform IDE for Rapid Application Development powered by Free Pascal. It is Delphi compatible and includes a drag-and-drop form designer and over 200 components, and can convert from Delphi code. It is extendable through packages and has a package manager with an online repository. Documentation and tutorials are available through a wiki, forums and books.
Lite XL is a lightweight text and code editor written in C and Lua, adapted from lite. It is available for Linux, Windows and macOS, comes in a bundle under 5MB, and is scriptable with Lua. It supports multiline editing, autocomplete and pane splitting by default, and can be extended with plugins.
Mobirise is website builder software for Windows, Mac and Linux that also runs online with AI. Users build sites by arranging blocks and editing text and photos visually, without coding. Mobirise AI generates draft site designs from a description. The software is free for personal and commercial use, and premium themes and extensions are sold as a kit.
Neovim is a hyperextensible Vim-based text editor. It is a fork of Vim, maintaining compatibility with Vim's editing model and Vimscript v1 where possible, and provides features such as Lua plugins, LSP-based code inspection and refactoring, and Tree-sitter parsing. Extensions can be built in any language through RPC, and GUI and IDE frontends can embed it as an editor or script host.
Open UI is a W3C Community Group that aims to let web developers style and extend built-in web UI components and controls such as dropdowns, checkboxes, radio buttons, and date or color pickers. The group plans to specify component parts, states, behaviors, accessibility requirements and test suites, and to implement polyfills for extensible controls.
openmediavault is a free, open-source network attached storage solution based on Debian Linux. It provides services such as SSH, SMB/CIFS, RSync and a BitTorrent client, with web-based administration for storing, sharing and backing up data on hardware the user controls. Plugins extend the system with additional functionality.
Own-Free-Website.com is a service for creating a free homepage without coding skills. It offers a short ".page.tl" domain ending, up to 1 gigabyte of free web space, design templates, and features such as a guestbook, hit counter and survey function. Premium packages are available for extending a site.
Pelican is a static site generator powered by Python that requires no database or server-side logic. It builds static sites from reStructuredText or Markdown content, supports themes using Jinja2 templates, generates Atom and RSS feeds, and is extensible through a plugin ecosystem.
PocketBase is an open-source backend tool distributed as a single file. It includes a realtime database, user authentication, file storage, and an admin dashboard. It can be used as a standalone application or extended via Go and JavaScript hooks, and integrates with common frontend development stacks.
Pragtical is a free and open source code editor licensed under the MIT license. It runs on Windows, Linux and macOS, and is built on SDL, C and Lua. The editor supports syntax highlighting, multiple cursors and a command palette, with LSP and other features available as plugins, and can be extended via Lua and its C API.
RelaGit is a graphical Git client built with SolidJS and Electron, available for Windows, macOS, and Linux. It provides extensible workflow and theme APIs for managing source code, and integrates with GitHub, GitLab, and Codeberg. Downloads are labeled Beta, and macOS 10.14 or later is required.
Source 2 Viewer (S2V) is a free, open-source tool for browsing VPK archives and viewing, extracting and decompiling Source 2 assets, including maps, models, materials, textures, sounds and particles. The project is reverse-engineered without an official Source 2 SDK and is not affiliated with Valve Software. It supports games such as Counter-Strike 2, Dota 2, Deadlock and Half-Life: Alyx.
Selenium is an umbrella project of tools and libraries for automating web browsers. It provides extensions to emulate user interaction and infrastructure for W3C WebDriver implementations, letting developers write interchangeable code for major browsers. It is primarily used for automating web applications for testing.
shadcn-svelte provides composable, accessible components with thoughtful defaults, intended for building a custom component library with code that can be customized and extended. It offers a library of components, and a changelog notes the release of Trace, Code Block and AI Elements.
Star History is a web tool for viewing and comparing the GitHub star history graph of open source projects. The site also lists a top committers ranking and provides a Chrome extension.
Tiled is a free and open source level editor with object layers, tile layers, and rule-based tile and object placement. It supports orthogonal, isometric and hexagonal maps, infinite maps, and world organization. The editor can be extended with JavaScript, and it exports to Image, JSON, Lua, GameMaker, Defold, tBIN and other formats.
Timber is a tool for building WordPress themes, using the Twig template engine to separate HTML display from PHP logic. Theme logic is handled in PHP files while Twig files handle presentation. It supports re-usable markup that can be nested and extended, and can be adopted incrementally alongside existing themes.
Source 2 Viewer is an all-in-one tool to browse VPK archives, view, extract, and decompile Source 2 assets, including maps, models, materials, textures, sounds, and more.
Vite is a frontend build tool for web applications, offering on-demand source file serving over native ESM with dependency pre-bundling and instant hot module replacement. It provides a plugin system extending Rollup's plugin interface, fully typed APIs, and first-class server-side rendering support. The project is MIT licensed and described as free and open source.
WAVE is a suite of evaluation tools that helps authors make web content more accessible. It can identify many accessibility and WCAG errors while facilitating human evaluation. WAVE is available as an online tool and as Chrome, Firefox, and Edge browser extensions for checking password-protected, locally stored, or highly dynamic pages. A subscription API and testing engine are also offered.