Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
Mistbox - Save 30% on your air conditioning bill
Fetchee - Fetchee is a free price tracking wish list app that works with all online stores worldwide.
Zen Thermostat - Control the temperature of your home anytime, from anywhere
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
LOOFT- A/C Redefined - Comfort Automated