We do run our own forum at: https://designhelp.fedevel.com/
In case you would like to work with iMX6 Rex and you don't have one yet, let us know and we will provide you an online access to one of our boards.
Software is a big part of iMX6 Rex project. We are accepting pull requests via our Github repositories. Code can be developed for Linux, Android, Windows Embedded, …
To contribute, get in touch via the Forum or email.
If you would like to share with community your own projects based on iMX6 Rex boards, just let me know.
Feel free to answer the questions in the forum or help other developers.