Google Friend Connect is a tool that helps web developers add social networking to their sites. Thankfully, Google realizes that adding such functionality can take up precious page real estate. Their solution to such design woes is a feature they're calling the "Social Bar."
The social bar is basically a social toolbar, but instead of residing in the browser, it resides on your website. It can be placed at the top or the bottom or your site. It enables drop-down menus to host widgets, a space saver indeed.
Here's a screenshot of the social bar and below that is a basic introduction to adding social bar to your site.