For discussion of the jack server as well as jack applications. If you’re doing anything with jack, you need to be on this list. See linux-audio-dev for email prior to 27 Nov 2001.
Not dedictated to JACK alone, but very often you will get help on questions about usage and troubleshooting with JACK here.
The official JACK implementation for Mac OSX
Jack for Windows
Jack for iOS/Android?
A general ressource for linux Audio related questions. The wiki also contains information about JACK and related topics.
Provides a discussion forum for linux audio related topics. Of cause JACK included.