To satisfy my curiosity I went out to find as many Google services as possible... I came up with this list...
- Clip and collect information as you browse the web - Google Notebook
- See what the world is searching for - Google Trends
- Google and browse faster and safer -
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- Google Pack
- Google Scholar Research - Google Scholar
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- Google Picassa
- A place where you can post all types of content and have it show up on Google - Google Base
- Discover and browse catalogs online - Google Catalogs
- Code with Google - Google Code
- Google search, in the palm of your hand - Google Mobile
- Search the full text of books - Google Print
- Google Secure Access, your internet traffic will be encrypted and sent through Google's servers to the Internet - Google Wifi
- Quickly search your computer - Google Desktop
- Mail from Google - Google Mail
- Explore, Search and Discover - Google Earth
- Create, search & browse groups to discuss and share ideas. - Google Groups
- The web based version of Google Earth - Google Maps
- Search and browse 4,500 news sources updated continuously. - Google News
- The most comprehensive image search on the web - Google Images
- Search for, watch and even buy an ever-growing collection of TV shows, movies, music videos, documentaries, personal productions and more - Google Video
- Smart shopping through Google. - Froogle
- Find blogs on your favorite topics - Google Blogs
- The web organized by topic into categories - Google Directory
- Google gone Lunar - Google Moon (zoom right in, go on!)
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- Help web pages show up in a snap - Google Webaccelerator
- description - Google Bookmarks
- Free online shareable calendar - Google Calendar
- Information about North American stocks, mutual funds and public and private companies - Google Finance
- Movie theatre showings (US only) - Google Movies
- Create and publish web pages in minutes - Google Pages
- Create a personalized Google homepage - Google Personal
- See your Google search history - Google Search History
Google Labs (http://labs.google.com/) has:-
- Create your own trip, complete with schedules from participating public transit agencies - Google Transit
- Keep up with your ever-expanding reading list of content from across the web - Google Reader
- As you type, Google will offer suggestions. Use the arrow keys to navigate the results - Google Suggest
- Want to offer your visitors search results that are tailored based on your site - Site-Flavored Google Search
- Automatically create sets of items from a few examples -Google Sets
A few others relating to internal Google stuff.
For a comprehensive list of all Google services, check out Wikipedia's - "List of Google products"