U Rank Search Engine from Microsoft Research

U Rank is a social search engine prototype developed by Microsoft Research.

U Rank is a research project to help us learn more about how people organize search results as they go about larger information tasks, how people collaboratively search, and generally, how people edit and share searches

According to the U Rank project page you can organize, edit and annotate search results, as well as share information with others.

• Collaboration: Share URLs with friends (”related projects”, “our reading list”)
• Recommendations: Tell your friends what you like (”best books,” “favorite restaurants”)
• Multimedia results: Mix video and images with web results for added context
• Ego-boosting: Make sure your home page is #1 (at least for you and your friends)
• Easy to explore what your friends are sharing
• Short-cuts: Move your favorite sites up; then put an ! in front of the query and go straight to the top result