To see all that google offers http://www.google.com/options/.

My favorite has to be http://www.google.com/linux

Froogle - froogle.google.com - New!
Find products for sale from across the Web. More...

Google Answers - answers.google.com
An open forum where Researchers answer your questions for a fee. More...

Google Catalogs - catalogs.google.com
Search and browse mail-order catalogs online. More...

Google Groups - groups.google.com
Post and read comments in Usenet discussion forums. More...

Google Image Search - images.google.com
The most comprehensive image search on the web with 390 million images. More...

Google Labs - labs.google.com
Prototypes and projects in development by Google engineers, including: Google Viewer - Google WebQuotes - Google Glossary - Google Sets - Voice Search - Keyboard Shortcuts. More...
Google News - news.google.com - New!
Search and browse 4,000 continuously updated news sources. More...

Google Special Searches - www.google.com/options/specialsearches.html
Narrow your search to a specific topic, such as BSD, Apple, and Microsoft.

Google University Search - www.google.com/options/universities.html
Narrow your search to a specific school website.

Google Web Directory - directory.google.com
The web organized by topic into categories. More...

Google Web Search - www.google.com
Relevant results fast from searching more than 3 billion web pages.

Google Wireless - www.google.com/options/wireless.html
Access Google's adaptable search technology from any number of handheld devices.


Google Tools

Google Browser Buttons - www.google.com/options/buttons.html
Access Google's search technology by adding our buttons to your browser's personal toolbar.

Google in Your Language - services.google.com/tc/Welcome.html
Volunteer to translate Google's help information and search interface into your favorite language.

Google Toolbar - toolbar.google.com
Take the power of Google with you by adding the toolbar to your IE browser. More...

Google Translate Tool - www.google.com/language_tools
Translate text or entire web pages.

Google Web APIs - www.google.com/apis/
A tool for software developers to automatically query Google. More...