Embroidery Library
http://www.emblibrary.com/EL/default.aspx
Embroidables
http://www.embroidables.com/
Designs by Sick
http://www.designsbysick.com/
Designs in Stitches (also has great FREE Designs)
http://www.designsinstitches.com/
ABC Designs Cartoon Embroidery (their prices are awesome)
http://www.freewebs.com/cartoonembro...abcdesigns.htm
Momo-Dini (these are extremely high end but well worth the $$)
http://www.momodini.com/