SEO Tools
Google Dance
Google Dance Tool
The Google Dance Tool is provided as a tool to help you, the webmaster, determine when the Google search engine is spidering the internet. This is extremely useful if you want to know when your site(s) will rank in Google.
Scroogle Scraper
Another Datacenter-Check-Tool is Scroogle Scraper. 21 Google IP addresses (datacenters) will be queried to see where it ranks. The Scroogle Scraper idea is to discover how consistent Google's index is across various data centers. One time per hour you can send the query to 88 datacenters.
GoLexa
The Search Tool GoLexa with complete Page Analysis for each result.
PR-Weaver
Use PR-Weaver to get the PageRank™ of each Page linking to your site. PRWeaver is a Download-Tool.