Google Browser

The Google Browser at TouchGraph.com is good for visualizing every web site in a particular space and which ones are important.

Google Related Pages

Do a search for the web site domain name (like "bareminerals.com") and click on "similar pages" or "related pages".

Alexa Ranking and related pages information

http://www.alexa.com

Overture Keyword Analysis

1. Go to http://searchmarketing.yahoo.com/rc/srch/
2. Click on the keyword selector tool.