Gubby keeps track of changes in your procmail log file, and will in real time display in which folders new email has been placed. Mailboxes are read using a specified external mail user agent. Output is normally displayed in a nice and colorful curses environment, but can also be printed to the standard output from the command prompt.
surblhost is a command line program that check if hostnames are blacklisted in the surbl.org lists. A blacklisted hostname means that the site is referenced in spam email. Although surbl is mostly used by spam filters such as spamassassin to identify spam email, you can use surblhost for many other purposes.