These are a few of my favorite sewing websites.
American Sewing Guild
Craftsy.com - Online courses, patterns, project ideas
Embroidery Library - Downloadable designs for machine embroidery
Apex Embroidery Designs - Downloadable designs for machine embroidery- great fonts!
Planet Applique - Very tasteful and adorable machine embroidery applique for kids.
Sew Sassy Fabrics - Online source for lingerie elastic. Great service and speedy delivery.
Fashion Sewing Supply - Great source for quality interfacing.