Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
Fetchee - Fetchee is a free price tracking wish list app that works with all online stores worldwide.
Oysho - Oysho allows you to discover trendy outfits around the world easily.
Keepa - Price history charts and the option to be alerted on price drops for all Amazon sites.
Ballwool - social network marketplace