Many of these sets are based around level 60 and below mail items from a wide variety of sets. The main pieces, which are generally the chest and legs come from the following sets, to name a few:
The weapon choices span all of the expansions of World of Warcraft. For a hunter, this generally is the focus of most sets. The changes made to hunters that they now carry their weapons on their backs has made them even more apparent than in previous expansions.
These sets would work well for shamans, as well, as I don't see any class specific pieces that stand out.
Thanks again for these great shots of your set concepts! :p
(xmog.cc link to her Protector's Mail based set)