Google is shutting down some of its services. Shut down product list:
Google Bookmarks Lists-on December 19, 2011
Google Friend Connect-for all non-Blogger sites on March 1, 2012.
Google Gears-On December 1, 2011.
Google Search Timeline.
Google Wave-on january 31, 2012, Wave will become read-only and On April 30 we will turn it off completely.
Knol-October 1, 2012
Renewable Energy Cheaper than Coal (RE<C)