Now that most of the ITN sites (usually access through Flyer Talk Talk Links) have been disabled or made inaccessible to us, what are our no-charge options (ie I am not talking about the KVS or Expert Flyer tools), such as other ITN type links, in terms of finding out inventory availability of various fare types on various airline flights.

(note- the UA ITN seems to go directly to the united.com web site - if one adds a requested itinerary on the UA ITN screen, the united.com web site gives options for itineraries with economy (coach) fares).