Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
Hull - The engagement layer for the internet. Hull is a platform that offers identity management, user engagement, segmentation and targeted messaging for your app.
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
Drmetrix - DRMetrix is the first 24/7 commercial monitoring platform designed for the direct response television industry
Fetchee - Fetchee is a free price tracking wish list app that works with all online stores worldwide.
SAP Crystal Reports - SAP Crystal Reports offers easy-to-use BI and reporting tool to design and deliver meaningful business reports.