SEO
Links
Google Rankings
http://www.googlerankings.com/
googlerankings.com - A tool to check your google ranking for keywords or keyword combinations.
NickStallman.net
NickStallman.net - Search engine optimization tools such as a Google Page Rank tool. Also offers SEO services.
Google Dance Tool
http://www.able2know.com/tools/google-dance/
Able2Know.com - Google Dance Tool - Google Dance Check. Use this tool to check the various Google datacenters.
Alexa Ranking
alexaranking.com - A simple tool that speeds up checking the Alexa traffic rank for multiple domains at a time.
WordTracker
wordtracker.com - A commercial site to track keyword popularity. Note that there are other free ways to do the same thing.
metaspy.com
metaspy.com - Watch in real time what people are searching for.