Fabric Club Great online fabric outlet with variety of fashion, quilting, and home decor fabrics. Because the prices are deeply discounted, stock turns over quickly, so don't hesitate. They provide good customer service, answer emails quickly, as well as fast delivery turnaround. Another great online discount fabric store. Fabric Direct carries apparel fabric, cottons, tapestries, and has bulk bundles to quickly build your fabric stash.
Gift certificates are also available.
If you are looking for a good source for outdoor and activewear fabrics, pattens, notions, and hardware, then check out Outdoor Wilderness. They have an extensive fabric line, and feature several different pattern companies that offer patterns designed for the outdoors. You can order online, and qualify for wholesale prices if you buy in bulk. This site offers real vintage fabrics from the 1930's - 1960's. Stop by and check it out.