bit-framework 
Bit framework is a full stack framework for C#, JavaScript and TypeScript developers. It's a combination of best practices and facilities to implement those best practices. Bit can help you develop high quality apps in less time.
You can develop any of following app types using Bit:
- Web Apps (Single Page web apps using Angular, AngularJS, React, Aurelia and Vue.js) (Web assembly support will be added soon, so you can develop PWA/SPA apps using C#)
- Cloud/Micro service friendly API
- Desktop Apps using Electron and Xamarin Forms
- Hybrid mobile apps using ionic
- Native mobile apps using Xamarin Forms and React Native
You can develop all these types of apps with Offline|Mobile first support. You also have access to RAD components such as Data-Grid, MultiSelect etc.
Contribute
There are many ways to contribute
- Code review
- Submit bugs
- Engage with other developers on stackoverflow
- Chat with us on gitter
Documentation
Read docs on https://docs.bit-framework.com/
You can also watch Announcements to track important docs/codes changes.