Clock Web App is an Open Source project that brings a feature rich Clock app to any system for completely free. It is developed for Web Based Operating Systems and is powerful software that is easy to use and easy to develop as it has a clean code base. Clone the repo, serve the public/ subdirectory, and that's it. No build process.
A few years ago I noticed that most of the unit converters on the digital stores were ugly, not immediately usable, with ads and tracking software. I thought it would be a good idea to develop Converter NOW in order to solve all these problems!
It is made to be easy, fast and immediately useable: just start typing and immediately you have the real-time conversion with all the other units of measurement. It is customizable: the units can be reorganized according to your priorities and your use case. It integrates a Calculator that let you do the calculations in every page.
Currency conversions are updated daily. Choose your favourite dark or light theme. Full Smartphone, Tablet and Web app support. It is free, no ads, no analytics, no permissions (just Internet to update currency conversions). And first of all it is open source!
Online demo site: https://converter-now.web.app/
This is an implementation of the Kiwix offline Wikipedia reader as a progressive web app which runs in modern web browsers. You can download ZIM files through the app for later or open ones you already have. As long as it's an OpenZIM format archive file you can open it. When you install it, it shows up like any other application on the desktop.
Two modes: Jquery (for older browsers) and ServiceWorker (newer browsers, also supports archives with dynamic content)
An open source self hosted notes and bookmarks taking web app. Looks like of like Pinterest and kind of like a kanban board. PHP, so it could be run in shared hosting.
Written as a PWA so in theory you can take it with you. Or at least the user interface, I don't know about the back-end database.
A Pixel Art Editor. Self hosted. Single page app. Draw old-school pixel art by hand in your web browser, save the images locally. Can assemble frames into an animated gif. Can even import an image file and turn it into an approximate pixel art image. Can be installed as a progressive web app but good luck getting those to work.
A free, fast and beautiful API request builder (web alternative to Postman) used by 60k+ developers. Play around with requests when developing against an API. Supports all HTTP verbs. Is technically a PWA.
Online demo (in devtools): https://postwoman.io