Filtered loot messages
GoFarm filters gray/white and money loot messages. After you're done looting, GoFarm prints the total amount looted from those corpses. If you've enabled automatic destruction of blacklisted items, it also tells you how many items were destroyed.
Kill tracker, XP & Loot totals, Instance lockout timer
The kill tracker is by the minimap. Mouse over it to see running totals of XP and money & items looted, and when you can enter your next instance. Click it to reset the counters.
Blacklist low-value items
Save bag space by blacklisting low-value items, saving space (and trips to the vendor) for better stuff. GoFarm can destroy them for as they are looted, or you can do it manually with "/gf trash".