SEO TOOLS

PR CHECKER TOOL

http://www.mygreencorner.com/prch.php
http://www.auroin.com/seo-tools/google-pr-checker.htm
http://dkameleon.com/scripts/pagerank/mass.php
http://www.pagerank.info/bulkprchecker.php
http://prchecker.info/check_page_rank.php

Google Cache Tool

http://www.indianseoexpert.com/tools/google-cache.html

BACK LINK CHECKER TOOL

http://www.indianseoexpert.com/tools/back-link-checker.html
http://www.webuildpages.com/neat-o/
http://www.iwebtool.com/tools/

RECIPROCAL LINK CHECKER:

http://www.seobook.com
http://www.recip-links.com/

Competitive site Analysis Tools

http://www.stuntdubl.com/2006/01/29/competitive-analysis-tools/
http://www.silktide.com/tools/sitescore
http://www.copyscape.com
http://www.webconfs.com
http://www.answers.com/

OUTSIDE INBOUND LINK CHECKER TOOL/ LINK POPULARITY

http://www.submitexpress.com
http://www.webuildpages.com/neat-o
http://www.domain-pop.com/backlink-check.php

COMMANDS FOR GOOGLE

Site Cache:- cache:domain name
Site Index:- site:domain name
Back link:- link:domain name

BROCKEN LINK CHECKER
http://www.sitereportcard.com/

Browser Compatibility CHECKER
http://www.anybrowser.com/siteviewer.html