pslist
finds and walked the doubly linked list of processes and prints a summary of the data. This method typically cannot show you terminated or hidden processes
pstree
takes the output from pslist and formats it in a tree view, so you can easily see parent and child relationships
psscan
scans for _EPROCESS objects instead of relying on the linked list. This plugin can also find terminated and unlinked (hidden) processes
important to use in addition to pslist
psxview
locates processes using alternate process listings, so you can then cross-reference different sources of information and reveal malicious discrepancies.