The Wrap Wallet. Could probably make this out of leather or fabric - 2 large pockets hold your many benjamins and 4 small pockets hold up to about 16 credit cards. The extra smaller pocket fits an iPhone 4 without a case.
Another pinner says: This site is Ahhhmazing! Everything you ever wanted to know about sewing. Sewing guides for tons of things and a bunch of great tutorials!" I need to learn how to use my sewing machine.
Upcycling a Shirt to a Purse - Free Sewing Tutorial + PDF Pattern