SellerCloud - SellerCloud is a multi-channel inventory and order management system.
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
SellerActive - Seamlessly integrate and manage incoming orders from the world’s most popular online marketplaces.
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
Multiorders - Shipping and Inventory Management Software is easy way to save time.
Fetchee - Fetchee is a free price tracking wish list app that works with all online stores worldwide.