We have an ongoing open source project
Android App and iOS app are published.
Also we are working on a brand new open source project Flutter-Quill.
Please contact me if you are interested (need to have basic understanding of Flutter).
Hi there, we contributed greatly to Google’s Flutter ecosystem by creating the most popular Flutter rich text editor flutter-quill in the open source community. It significantly helps the growth of Flutter that Google is trying to promote worldwide. We really appreciate it if you can give 
to this fantastic GitHub project 