Getting links to your site is a high priority requirement for those who are seriously interested in promoting their web sites. Many search engines are starting to use site popularity as a way to rank your site. In other words, a site with 100 links to it will rank higher in the search results than a site with only five or six.

Link popularity analyzer

Link Popularity tells you how many websites are linking to yours

Alltheweb
This is a search engine. When you click- investigate this URL it give link site to that URL.

Even Google give back links for URLs.

Seoforum
This is another site to find Back links.

Trafficzap
Different search engine find your site differently. Try it here. Click the search engine/s you want.

Check whether you links are there in other pages.

It is well know thing that obtaining link popularity for numerous links is an enormous task. You also know about the time alone to reciprocate links will take weeks with all the emails, agreements, contacts, adding links, publishing and republishing your web site for other webmasters.

Here you can check whether you links are there in particular web site.

Addme
Here you need to sign in but free.