RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.