some of this is already known, still everything in one place

[cvrk3]

Google Web Search Features

In addition to providing easy access to more than 8 billion web pages, Google has many special features to help you to find exactly what you're looking for. Click the title of a specific feature to learn more about it.
• Book Search - New!

Use Google to search the full text of books.
• Cached Links

View a snapshot of each page as it looked when we indexed it.
• Calculator

Use Google to evaluate mathematical expressions.
• Definitions

Use Google to get glossary definitions gathered from various online sources.
• File Types

Search for non-HTML file formats including PDF documents and others.
• Froogle

To find a product for sale online, use Froogle - Google's product search service.
• I'm Feeling Lucky

Bypass our results and go to the first web page returned for your query.
• Local Search

Search for local businesses and services in the U.S., the U.K., and Canada.
• Movies - New!

Use Google to find reviews and showtimes for movies playing near you.
• News Headlines

Enhances your search results with the latest related news stories.
• PhoneBook

Look up U.S. street address and phone number information.
• Q&A - New!

Use Google to get quick answers to straightforward questions.
• Results Prefetching - New!

Makes searching in Firefox faster.
• Search By Number

Use Google to access package tracking information, US patents, and a variety of online databases.
• Similar Pages

Display pages that are related to a particular result.
• Site Search

Restrict your search to a specific site.
• Spell Checker

Offers alternative spelling for queries.
• Stock Quotes - New!

Use Google to get live stock quotes and information.
• Street Maps

Use Google to find U.S. street maps.
• Travel Information

Check the status of an airline flight in the U.S. or view airport delays and weather conditions.
• Weather - New!

Check the current weather conditions and forecast for any location in the U.S.
• Web Page Translation

Provides English speakers access to a variety of non-English web pages.
• Who Links To You?

Find pages that point to a specific URL.

[darrenstraight]

In case you didn't know you can find them all here:
http://www.google.com/help/features.html

[suchnight]

To find a product for sale online, use Froogle - Google's product search service.
• I'm Feeling Lucky
<-- I dont know "I'm Feeling Lucky" defined in sale online before.