Modules
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 |