#5906 Paint Horse - Bay Pinto (2006-08) is a well traveled model and can be found in the Rural King #701850 Stablemates Country Stable Barn (2010) as well as the Various Retailers Horse-A-Day Calendar (2011-2012). The model is a red bay tobiano with the "map and cape" pattern draped over its back. The pattern irritates purists because, except in very rare cases, tobiano horses have white on all four legs. These models have a near-fore stocking, an off-fore pastern, and nothing on the back legs. The mane is two-toned black/white and the tail is white. A small star and eye-whites finish things off.
BreyerFest Breyer Store Special #711080 Stablemates 20th Anniversary Commemorative Set - 2000 Leah's Fancy Chick (2009) is a lighter bay with lovely shading and a "head and haunches" tobiano pattern. All four legs are white, as is the tail, the mane is two-toned black/white, and she has a blaze ending in a snip, and eye-whites.
#5941 Mystery Foal Surprise Gift Set (2012-13), too, is a bay pinto, but this time the pattern is frame overo, with large patches on both sides, a large blaze, and three socks, not including off-fore. The model should have a spritz of roaning over the bay colour, but it can be nearly invisible on some, and un-roaned models are certainly possible.
Target #720599 Horse & Foal Set - American Quarter Horses (2006) is a metallic palomino with cream mane/tail, off-hind sock, grey shaded muzzle, and a blaze.
It was later released as #5922 Horse and Foal Set: American Quarter Horses - Palomino (2007-2015) and in the Various Retailers #710717 Cherry Creek Western Ranch (2009).
#59202 Stablemates Riding Academy (2007-Current) is a caramel-coloured palomino with bright white mane/tail, three socks, not near-hind, a star and snip, and eye-whites.
#5397 Horse Crazy Gift Collection (2015-Current) is a shaded yellow palomino with four airbrushed socks, shaded knees/hocks, white mane/tail, star, and eye-whites.
#5976 Gift Collection (2009-11) is a shaded palomino frame overo with shaded legs, four stockings, white mane/tail, blaze ending in a white muzzle, and eye-whites.
BreyerFest Breyer Store Special #711080 Stablemates 20th Anniversary Commemorative Set - 1995 Mego (2009) is a yellow palomino tovero with a patch pattern, three stockings with a white pastern on the off-hind leg, apron face with black spotting on the muzzle, white mane/tail, eye-whites, and a diamond-D brand on the near haunch.
#46003 Fun in the Sun 500 Piece Puzzle (2008-09) could be considered a sooty palomino, but most people just call it a flaxen liver chestnut. It has an intricate tobiano pattern with four stockings, blaze, eye-whites, and cream mane/tail.
#5412 Stablemates Horse Lover's Collection Shadow Box - American Quarter Horse (2011-2016) has been re-released as #5425 Stablemates Horse Lover's Collection Shadow Box - American Quarter Horse (2017-Current) and is a slightly metallic brown-toned bay with near-fore and off-hind socks, and a blaze which narrows towards the top.
#5405 Horspital Play Set (2008-09) is a slightly metallic red-toned bay with near-fore and off-hind socks, and a blaze which widens towards the top.
JCPenney #410421 Stablemate Parade of Breeds - Quarter Horse (2007) is a bay dun with dorsal stripe, leg barring, four socks, blaze, and eye-whites.
Tractor Supply Company/Other Retailers #5906 Dun Quarter Horse (2008) is a shaded buckskin - called dun, but lacks dorsal stripe/leg bars - with near-fore and off-hind socks, star, snip, and eye-whites.
Target #720220 Pony Gals - Appaloosa (2009) is an orange chestnut appaloosa. The small blanket is airbrushed with polka-dot spots which match the base colour, near-fore and off-hind socks, and eye-whites.
Toys 'R' Us #760218 Stablemate World of Horses Shadow Box - Appaloosa (2010) is an orange chestnut appaloosa. The small blanket is airbrushed with polka-dot spots which are darker the base colour, near-fore and off-hind socks, and eye-whites. The base colour is slightly darker and has more of a shine than the Target SR.
BreyerFest Breyer Store Special All American Tribute - Colorado Rangerbred (2007) is a flaxen liver chestnut appaloosa with a stenciled hip blanket with stenciled spots. It has white hind pasterns with striped hooves, a star, and eye-whites.
JCPenney #410512 Stablemate Parade of Breeds - Appaloosa (2009) is a flaxen liver chestnut appaloosa with a small airbrushed blanket with polka-dot spots, near-fore and off-hind socks, large snip, and eye-whites.
Stablemate Assortment #5907 Quarter Horse (2009-11) is a chestnut roan with a creamy base coat, chestnut roaning, shaded legs and matching mane/tail. It has a star, snip, and eye-whites.
Walmart #97245 Horse Crazy Surprise (2017-current) is thought to be a re-release of #5907, but I have not seen pictures yet to determine if there are any differences in colour.
Many thanks to MySt of My Stablemates for providing pictures for this post!