SteamAlerts - Track prices and receive alerts when Steam games go on sale
Coupofy - Coupofy is USAs number 1 trustworthy deals and coupons website.
SnapUp - Wireframe faster / create amazing user interfaces
Giftwhale - Giftwhale allows you to create personalised wish lists online.
PriceCute - Keep up with your competition's pricing on Amazon
TrackIf - Alerts you if the price of your favorite products drop