Meshtastic is an open source, community-driven project that uses LoRa radios as an off-grid communication platform in areas without reliable communications infrastructure. Devices rebroadcast messages to form a mesh network without cell towers, WiFi or internet, and can be paired with a phone or computer via Bluetooth, WiFi or USB. Clients include Apple and Android apps, a web client and a Python CLI/SDK.
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A browser-based tool that generates HTML meta tags for single-page apps, using Open Graph and Twitter web standards. It also produces social media posts and stores the last generated form in localStorage. Inputs cover title, description, keywords, URL, image URL, author and Twitter username.
Meta Tags is a tool for editing and experimenting with page metadata, then previewing how a webpage will appear on Google, Facebook, X and more. The site also links to official debuggers for Facebook, X, LinkedIn and structured data.
Mitosis is an open-source tool that transforms JSX components into functional components for frameworks such as Angular, React, Qwik, Vue, Svelte, Solid, and React Native. Writing UI components once in JSX allows them to be deployed across platforms without rewriting code for each framework. It also integrates with Figma to sync design systems to code and can generate Lit, Stencil, and raw web components.
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.
Mossaik creates abstract SVG backgrounds with waves for websites, mobile devices, tablets, laptops and presentations. Options include the number of waves, angle, color and color mode, and designs can be exported as SVG or PNG images. The editor is launched from the site.
Nekoweb is a free website hosting service created by a group of coders, programmers and artists. It supports custom domains, password-protected pages, SSI, FTP, WebDAV and Git support as donator features, a file editor, and blocking of generative AI crawlers. It is ad-free and run by donations.
OG Image Generator is a free web tool for creating open graph images, social media previews, and Twitter cards. It offers customizable templates, fonts, and optional app screenshot support, exporting images as 1200×630 PNG files.
Onelang is a browser-based IDE for cross-language editing, exposed through a web interface. The page notes that unsupported browsers may not work and recommends the latest Chrome or Firefox. It offers demos covering generic features, reflection, inheritance, big integers, JSON handling and Hello world, and states that the compiler backend requires authentication.
OneLinePlayer is a free web video player for Vimeo and Dropbox videos. It uses a direct link to a video file and offers preview images, player style adjustments, and controls such as autoplay, loop and mute. A GIF mode is available. The makers state they are not a video hosting platform. Certain Vimeo controls customization requires a Vimeo Plus plan or above.
OONI, the Open Observatory of Network Interference, is a global community measuring internet censorship. OONI Probe tests the blocking of websites and apps and measures network speed and performance, while OONI Explorer displays censorship data collected from over 200 countries since 2012.
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.
OpenPanel is a multi-user web hosting control panel built around lightweight containers. Each user gets an isolated environment with a separate MySQL server, PHP version, Redis instance and root access. Administrators and resellers manage servers through the OpenAdmin panel, and the OpenPanel interface lets clients manage domains, websites, services and email. OpenCLI provides terminal commands for panel actions.
OpenSpeedTest is a browser-based HTML5 internet speed test that measures download, upload, ping, and jitter without Flash or Java. It works on phones, TVs, consoles, and computers. A free and open-source self-hosted server can be deployed, and a speed test widget can be embedded on websites or apps.
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.
PaletteGenerator is a tool for generating color palettes for web UX/UI design. It offers 8 harmony methods, a live interface preview, palette refinement, and export to CSS variables, JSON and SVG.
Paletton is a designer color tool for creating color combinations that work together well. It uses classical color theory with an RYB color wheel to design palettes of one to four hues, each of five shades. Palettes can be previewed in styles including web site design and UI design, and exported in formats such as HTML, CSS, XML, PNG and Photoshop ACO. It is the successor of Color Scheme Designer.
Panda is a frontend design resource for CSS frameworks, UI components, and web interfaces.
Lorem Picsum provides placeholder photos. Adding an image size to the URL returns a random image, and options allow a specific image, a seeded random image that stays the same, grayscale and blur. Multiple options can be combined, and .jpg or .webp file endings can be added. Endpoints list images and return details about a specific image.
Pingdom's free Website Speed Test analyzes a webpage's load time and identifies bottlenecks. A full page test breaks requests into stages such as DNS lookup, SSL handshake, connect, send, wait, receive and blocked, and flags redirects and 4xx or 5xx responses. Pingdom also offers uptime and performance monitoring from more than 70 global polling locations.
A web automation and testing framework for apps, scripts, and AI agents. It offers a test runner with auto-waiting and assertions, browser automation across Chromium, Firefox, and WebKit, and a Model Context Protocol server for AI agents.
ProFreeHost is a free web hosting service for personal and commercial use. It offers PHP, MySQL, FTP and email hosting with unlimited bandwidth, a control panel, a one-click installer and free subdomains. The features page lists 5GB diskspace with quotas for addon domains, parked domains and MySQL databases.
Publii is a free, open-source desktop CMS for static websites. Content is written locally and published to hosts such as GitHub Pages, Netlify, Amazon S3 or via FTP, with no database, PHP or public admin panel. It offers Markdown, WYSIWYG and block editors for blogs, portfolios and documentation sites.
PythonAnywhere is a cloud service for hosting, running and coding Python. The basic plan provides access to machines with a full Python environment already installed, and quickstart installers are available for Django, web2py, Flask and Bottle.