"Delete Files" deletes files from a job folder.
"Hot Folder Monitor" checks a certain folder every so often to see if files disappear from the folder. If not, it means that the application that should be processing those files is not running.
"File Pool Cleanup" allows to remove files from a file pool that are older than a certain number of days.
"File Property Sort" puts files inside a job folder in a certain alphabetical order based on a property of the file.
Finally, "Submit Filespec" can be used to submit files from a hierarchy, but only those that match a certain file specification.