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Awesome Opensource Apps is a storage, design, or frontend resource for mockups, assets, UI tools, or web search.
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cloudron.io
Cloudron is a self-hosted platform for running web apps on one's own server, providing app updates, user management, a built-in mail server, firewall and encrypted backups to external storage. Apps are installed from the Cloudron App Store, and the design allows migration of apps across servers.
anvil.works
Anvil is a Python-based drag-and-drop web app builder. It provides a visual designer, Python in the browser and on the server, and one-click deployment. Apps are automatically hosted, and deployment environments map a URL or Uplink key to a version of the app with its configuration. Apps can be exported from the cloud editor and hosted on a computer using the open-source Anvil App Server.
sandstorm.org
Sandstorm is an open source platform for self-hosting web apps. Each document, chat room or other item is containerized in its own sandbox, and items stay private until shared through a unified access control interface. Apps are installed from an App Market and receive automatic updates. Users can run it on their own machines or on hosting services.
diegocard.com
A curated list of HTML5 resources inspired by awesome-php and awesome-python. It links to articles and standards, tutorials and references covering topics such as audio, media capture, speech synthesis, WebGL, Web Workers and progressive web apps.
stackblitz.com
StackBlitz is a collaborative browser-based IDE for web developers that runs development environments inside the browser through WebContainers, avoiding time-consuming local configuration. It also offers Bolt, which turns text into working web apps in the browser. The free Personal plan includes unlimited public projects and GitHub repositories.
html5boilerplate.com
HTML5 Boilerplate is a professional front-end template for building fast, robust and adaptable web apps or sites. It provides a starter index.html with recommended meta tags, a main.css with base styles, helpers, media queries and print styles, and independently maintained server configs for multiple platforms.
bootstraptaste.com
BootstrapTaste is a directory of free and premium Bootstrap templates and themes for building websites and apps. It lists templates such as Bootstrap admin, resume, startup landing page, business and corporate templates, with demo and download links.
chaos-frontend-toolkit.web.app
Chaos Frontend Toolkit is a browser extension bundling tools intended to break web apps so developers can find ways to improve them, applying chaos engineering principles to the frontend. It covers areas such as network, timers, history, accessibility, localization and inputs, and is available on Chrome, Firefox and Edge as an open-source GPLv3 project.
freehosts.eu
FreeHosts is a community-curated directory of free hosting providers for websites, bots, apps and Discord communities. It covers website, application, bot and database hosting, and offers guides on choosing free hosting, including comparing storage, bandwidth and compute limits. It is aimed at experiments, learning and small projects, and cautions that most free plans have limits.
meshtastic.org
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.
lewdev.github.io
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.
ooni.org
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.
openspeedtest.com
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.
playwright.dev
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.
virejdasani.github.io
Responsivize is an open-source, cross-platform desktop app for developing responsive websites. It lets users test web apps on popular devices or custom dimensions and includes device frames, browser menubars and search bars. The app works on Windows, MacOS and Linux and is free to use.
surge.sh
Surge is a static web publishing service for front-end developers that deploys projects from the command line to a CDN. It offers free custom domain support, free SSL for surge.sh subdomains, pushState support for single page apps, custom 404.html pages, and a CLI. Projects can be deployed through build tools such as Grunt, Gulp, Git Hooks, and npm run scripts.
whatpwacando.today
What PWA Can Do Today is a demo site explaining Progressive Web Apps and showcasing live examples of their capabilities. It states that a PWA is a website installable like a native app, able to work offline, send push notifications, and access device hardware such as camera, Bluetooth, and NFC. The site presents over 40 live demos and notes that the app itself is a PWA.