I don't rely on tools and I never recommend them. They do not provide precise results and might not be updated thoroughly.

I'am now trying to make the tools to check backlink, PR, indexed page

I would like to recommend seoquake or seo4firefox add-ons for Firefox. They are both AIO tools to find backlinks from above sites.

In search box type
link:yourdomain.com

link:www.yourdomain.extension

almost for all search engines this is a common forumula

this is my only contribution
monitor.mazecore.com/rankmeter.php
just sign up for free account and you can see your backlinks from those three major search engines. Hope it can help.

I only know about google. Here's the syntax:

Thanks for your Great post. I will use to find backlinks by using yahoo.
It will show the correct backlinks which we get for particular website.

I was finish with my engine to check backlink. Thank you for all of yours help. Thank's again

In manual checking of backlinks you can use this key text link:domainname or if you are using firefox, SEOpen add ons will be a big help. or the site backlinkwatch.com