Etsy.com. One of the most unique shopping experiences out there. They're an online marketplace for buying & selling all things handmade. Very human to human products. None of the mass-manufactured stuff. Polar opposite of Walmart.
First off, all content is consumer generated. To design a beautiful interface with that fact alone is impressive. But beyond that, Etsy has built in some fantastic search features. Not only fantastic in function, but in form as well. All designers and developers should take note. Check some of them out... like the Time Machine, Geolocator, Connections. They also offer online classes, a community forum (social network) to connect with other Etsy users and other useful little features.
Etsy defines: "A positive first impression & a positive user experience". Good job Etsy.
Contributed by:
Jennifer Strickler
Director of Flint Interactive