Here is a list I'm starting of sites I know of that are still around ~ if you have some to add please do let me know - and make sure your site is listed here!  If you find any inactive links please let me know.

A-Pixel-N-Time
Angel Dreamz
Annica's Home
Catinho De Bella TCG
Chez Sylvia Pixel
Country Delights
Country Pixel Paws ~ Actively updates purchaseware.
Crazy Siggie Club
Disbme
Doodlebug Pixels
Elf Expressions
Euri's TCG
Fancy Cricket
Fantastic Pixel Dreams ~ Actively updates purchaseware.
Inge's Pixelwelt
Inger's Pixels
Laura's Pixel Page
Lil Pixel Treasure
Mama Bear Designs
Mely's Arts
Peppermint Pixie
Pixel 2 Pixel
Rosey Posey Pixels
Siggies Village
Style Shop Pixels
Sweet Pea Fairy
Tati Pixel
Vanilla Patch
Vix's Pixels
Whimsy Attic ~ Actively updates purchaseware as well as a members area.