StumbleUpon

StumbleUpon is an Internet community that lets users find, and rate pictures, websites, and videos.
About.
StumbleUpon is an easy to use website, which provides new and interesting material on the web. They get more 20 million users who join the site for information, entertainment, and content that they are looking for. Moreover this site harbors more than 60,000 brands, publishers, and other marketers which use StumbleUpon’s comfortable paid discovery platform to help support their materials and services.