These are web-based tools, which are interactive and allow users to be active participants while using the internet.
According to wikipedia.com , these tools refer to a perceived second generation of web-based communities and hosted services — such as social-networking sites, wikis and folksonomies — which facilitate collaboration and sharing between users.
This is a great social bookmarking tool, where you can save your favorite sites. Instead of saving websites to your favorites in one computer, you can save your sites in backflip and access them from any computer.
You can organize your sites by putting them in different folders.
There is a cool Backflip button that you can put on your link toolbar and everytime you are on a website you like, you just have to click on the backflip button and it will save it to backflip.
You can also share your backflip page with others. It is a great tool for teachers in the same department to share resources.
Teachers can also use this tool to share important resources with students. Even students can share resources that they find on the internet.