DTaskManager is, obviously, a Task-Manager (stand-alone) specifically engineered to give additional functionalities that the Windows bundled TaskManager (and other third party product) does not have:
Three different way to close a process, as the "termination request", the "forced termination" and the "forced termination" of any type of process bypassing all permissions (it can terminate also system processes).
It allows to suspend and reactivate a process (as in Linux), useful, for example, to temporarily suspend a task that use system resources but you don't want to terminate (as a DivX coding process).
It allows selecting more than one process at a time to terminate all of them.