Google Co-Op – Help other users find information more easily by creating “subscribed links” for your services and labeling webpages around the topics you know best.
Google Trends – A way to see how often people are searching for certain terms on its site and where in the world those searches are popular.
Google Notebook – Allows users to record information they have found on a series of Web pages and make that research public.
Coming next week!
– via NY Times