Drmetrix - DRMetrix is the first 24/7 commercial monitoring platform designed for the direct response television industry
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
SAP Crystal Reports - SAP Crystal Reports offers easy-to-use BI and reporting tool to design and deliver meaningful business reports.
Fetchee - Fetchee is a free price tracking wish list app that works with all online stores worldwide.
Price2Spy - Price2Spy is a price monitoring, pricing analytics, and repricing tool, meant to help eCommerce professionals keep an eye on their competitors or retailers.
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.