download google toolbar. Aside from PR checker you can also check for your backlink and cashed page of your website.
There are plenty of tools: -- http://oyoy.eu/page/links/?url= -- http://www.seochat.com/seo-tools/link-popularity/ -- http://www.addme.com/popularity.htm -- and so on for your own site: your google webmaster account for other sites: http://siteexplorer.search.yahoo.com/
The google toolbar is not a correct way to check backlinks since it deliberately reports only a very small portion of the backlinks.
This tool will give you backlink information and more: www.checkpageranknow.com/complete-website-analysis.php
Use the Yahoo site explorer. Go to yahoo.com and type in - linkdomain:yoursite.com It's the most accurate link checker you will find (what do you think all the paid programs use?)
If you want a very accurate result, check it manually through yahoo site explorer But if you are looking for a fast and free tool, backlink watch is a good one, 'coz it also shows the anchor text you used for that link.
1- backlinkwatch.com 2-You can try this tool for backlink checking: http://ekstreme.com/backlink-analyzer 3-You can also use http://www.searchenginegenie.com 4-Best way is in google write link:yoursite.com
backlinkwatch and http://seopro.com.au/free-seo-tools/new/link-checker/ are both good...it gives relevant and accurate information...