From scouring ebay auctions, this is what I have gleaned. Please add or correct if I'm wrong:
the big guys:
Robeez
Bobux
Shoo Shoos
Jack and Lily
Plateau
Lil Jo's
the store brand knockoffs:
Teeny Toes (Payless)
Circo (Target)
George (Wal-Mart)
Tender Toes (private label)
Gymboree (elastic doesn't go all the way around)
UK makers:
Daisy Roots
Shimmy Shoes
ebay stores:
ShooFly
Alba's
Me in Mind (softsoleshoes)
Just Q
I-wawa
Bambino
Little Toes Shoes
the rest/unknown origin:
Carter's (elastic doesn't go all the way around)
Hammey
Roper
Carozoo
Gagoo Gagoo
Mini Star
Wiggee's
Apple Cheeks