ftrack connect is all about connecting ftrack to other systems and providing tighter integration into your everyday workflows.
It revolves around a service, installed locally onto each individuals machine, that provides enhanced functionality for the web interface including launching applications, notifications, local action processing and multi-site as well as generic interfaces for logging time and publishing any kind of data into ftrack.
ftrack connect package contains that core service and standalone applications. Specific integrations with other applications are named following the convention ftrack-connect-[application] and are available separately. In the not too distant future you will be able to install and configure those separate integrations directly from within both the ftrack web interface and also this core system.