I am going to introduce a wonderful website,
StumbleUpon. It's some kind of search engine that help the user to search for recommended web content for user which fits user's interest.
Home Page
In the home page after log in, I can edit my interest.
For example, I click on the word "Movie", it'll first direct me to a page. Click on the Stumble on the top left conner to find which site it will recommend us. The image, somehow not really related though.
After click on Stumble, the web page that recommend by the website will be shown randomly. You'll never know which site will be shown, you'll even get to know some new websites that fit your interest through here. For example:
It shows me 3 different web sites as I click stumble 3 times. Moreover, These are the website I don't know and I get to know new websites about movies, which I am very interested in. All in all, it's a good sites for me, as a designer to look for more useful references.