I've had good results using products from this outfit. Generally anything you can buy in a Lowe's type store (like Amdro) is worthless. The ants ignore it. These guys solved my carpenter ant problem when nothing else I tried bothered the little bastards.
Terro is good - and that outfit has Deltadust, which I’ve heard is also very good.
Termidor SC (Fipronil 9.1%) works on carpenter and crazy ants according to domyownpestcontrol.com - outdoors only.
Some states do not allow unlicensed applicators for some products and so those products are not for sale to the general public.