Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
WishSimply - Wishsimply is a easy-to-use online and mobile service to manage and share your wish lists.
Fetchee - Fetchee is a free price tracking wish list app that works with all online stores worldwide.
Wishtack - Create your wishlist right now!
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
Anywish.app - Collect gift ideas for your loved ones and share your own wishlists. Add items from any online store. The perfect list maker for Christmas and other events!