Google
Enables users to search the Web, Usenet, and images. Features include PageRank, caching and translation of results, and an option to find similar pages.
http://www.google.com/

Google Maps
Find local businesses, view maps and get driving directions in Google Maps.
http://maps.google.com/

Google Videos
Search and watch millions of videos. Includes forum and personalized recommendations.
http://video.google.com/

Google.org
The philanthropic arm of the company. Lists its activities.
http://www.google.org/