Here is a list of some of the tours, all of which are excellent behind the scenes tours and you could not go wrong in my opinion. Some of the names are not exact but close enough for a search.
MK
Keys to the kingdom
steam trains
Backstage magic(mk,epcot,mgm)
Epcot
Undiscovered world show case
undiscovered futureworld
Behind the seeds
Segway tour
Seas Aqua tour
Dolphins in depth
Animal Kingdom
Wild by design
Backstage safari
MGM
Has no separate tours but can be visited through the seven hour backstage magic tour. It does however have the "dine with an imagineer" experience