AngelList

The most viral way for artists to promote their music and videos on Facebook

Engage the Payer not just the Player

Facebook powered personalization and marketing for premium retailers.

Sell Products through the Facebook Comments (500S W12)

Bandpage for the food industry

An awesome new way to browse your Facebook photos

WildFire for Crowdsourcing

A Facebook-powered Social Hub for Moms.

Get together with real friends, right now.

News media on facebook! We introduce Japan culture"Manga"Anime"Popculture".500startups S12

Tournaments, Real-time Competition

Your Multimedia trivia games platform

Games for our 150 million high school classmates

Poker with a Trivia Twist

Building the marketplace for social power shopping.

KLOUT for positivity - social media app that measures and improves online positivity

Stackmob for Facebook Applications (inc. gamification and in-app metrics)

Get Fans through Facebook Apps

E-commerce made easy as blogging

saas ecommerce Web - Facebook

Enabling e-commerce on Facebook

Social travel gift card

Shop fashion on Facebook

e-commerce just got SOCIAL

SHOP...GIVE...SHARE...