Here is a list of all modules:
 Creating & manipulating clients
 The non-callback API
 Setting Client Callbacks
 Controlling & querying JACK server operation
 Creating & manipulating ports
 Managing and determining latency
 Looking up ports
 Handling time
 Controlling error/information output
 Creating and managing client threads
 Transport and Timebase control
 Reading and writing MIDI data
 Session API for clients.
 API for a session manager.
 managing support for newer/older versions of JACK
 the API for starting and controlling a JACK server
 Metadata API.