backlinkwatch .com is what I use.

Yahoo Site Explorer is a good tool, however, its important to note that it will only show you backlink that the Yahoo/Bing spider has indexed. Thus you may have many, many more links in your profile but Yahoo won't report them--because it hasn't found and/or indexed them yet.

ahref.com is a good one but honestly every source will have different data. Do not rely on any resource. Monitor your rankings.

SEO Spyglass free version

Actually there are lots out there. All you have to do is to search in Google what are some service available.

i notice backlink watch doesn't work all the time. i prefer, yahoo site explorer which is much manual way.

my fav tool is seo spyglass..

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Google analytics is the best tool that provide the accurate report of the backlinks and also will provide the other details of your site.
And the other you can check the backlinks manually. As write Link:yoursitename and this will generate the result of the site from which you have get the backlinks to your site.

Backlinkwatch.com is best way of check back lnks.

I kind of like linkdiagnosis. I believe you need to install their free firefox addon to use it though. It used to query yahoo site explorer for results, but recently they switched to querying seomoz so it is a little limited. It will tell you the backlinks pagerank along with how many links are on the page, moz authority, whether it is dofollow or nofollow and how strong the backlink is and a few more details. I use an assortment of backlink checkers on top of linkdiagnosis.

Two suggestions....

Majestic SEO - the second option in Market Samurai. - Majestic SEO: Site Explorer

Scrapebox's Free Link Checker - Free Link Checker - ScrapeBox

I'm using backlinkwatch, too. But to be frank, comparing with yahoo site explorer, it's horrible.

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Vote for SEO spyglass free version!!

nice info here... I will check it out.

Yeah so far I am happy with backlinkwatch but now got another effective tool to use by SEOmoz.Used yahoo site explorer also but I would say its an average tool.

I use Scrapebox and BacklinkWatch, a free web-base backlink checker.

As and when YSE is going to disappear, spyglass, backlinkwatch etc are going to have trouble.

I would say to monitor your SERP rather than number of backlinks.

Never saw anything better than SEO Spyglass

You can check your backlink by link keyword in google or link domain. you may also try backlinkwatch.com

I use backlinkwatch.com

For checking the number of my backlinks, I usually use seocentro.com and submitexpress.com.

For some additional information about my backlinks, I use backlinkwatch.

I think if you use Mozilla Firefox you can install web rank tool by clicking Add-ons bar under tools menu.

SEO TIPS

I like to use Backlink Checker as far as it works.

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Yahoo site explorer is closing down and the indications are no longer good. Remain payable tools. I tested recently, for example:
ahrefs.com
opensiteexplorer.org
majesticseo.com
and returned to free backlinkwatch.com

Be careful. Sometimes the results are not updated often. In opensiteexplorer for example you can read:
Linkscape crawls the web constantly, but we update the index only once every 30-40 days. Thus, pages and links created since the last index update won't be available until we've seen them. A typical timeline for getting a page/site included in Linkscape is 45-60 days, sometimes less for very important or well-linked-to pages.

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