Communication

There are several popular communication channels:

Forum The recommended way to get help. Very active. Rich modern interface. Public, archived discussion.
Mailing Lists An established and trusted resource for help. Thousands of subscribers. Public, archived discussion.
Chat ImageJ developers and experts frequent real-time chat services including Gitter and IRC.
Stack Overflow Some people like to post about ImageJ on Stack Overflow, a programming Q&A site.
Reddit Some people like to post about ImageJ on Reddit, a community bulletin board.