Indeed CM Middleware is the component to provide for unified interface to manage the devices connected to workstation for all the other components of the system.
Indeed CM Client Tools
Credential Provider is the component for unlocking the smart cards used for Windows authentication, both in online and offline mode.
Indeed CM Unblock is the component for unlocking the smart cards not used to login to operating system.
Indeed CM CM Agent is the component to perform tasks remotely on user devices (locking, unlocking, administrator PIN code change etc.).