Astra for iOS - Mission control for your money
Wikibuy - Find lower prices at other sellers while you shop on Amazon
Penny - Penny is a personal finance app that takes the pain out of keeping track of your finances.
CouponFollow Cently - Coupons at Checkout is a browser plugin for Chrome, Firefox, Internet Explorer, and Safari that...
Entaxy - Insight into your finances, without sacrificing your data
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.