Google Blog Search provides fresh, relevant search results from millions of feed-enabled blogs. Users can search for blogs or blog posts, and can narrow their searches by dates and more.
Google+ aims to make sharing on the web more like sharing in real life. Take a look at Circles, Events and Hangouts; just a few of the things that we've been working on.
Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people they meet.