Steps
1. Enter your URL
2. Choose the type of search you wish to perform.
3. Select the Search Engine that you wish to see results from.
4. Press "Run Check" and receive your results in a new window.

Be aware that several search engines share or combine their index of results. Google and Inktomi for example syndicate their search index to other portals.

Explanation
Link Popularity - Find out how many pages link to your site. Though this will not return links from pages of lesser importance, it can be an excellent first-look into who is linking to you. Don't forget to try with and without the www subdomain as this can make a difference.

Search Engine Visibility - Know which pages on your site a search engine has listed in their index. This will return the pages that the search engine has archived.

Buzz - This tool helps you find out who has mentioned your domain name on the Internet. Sometimes people link directly to you which will result in link popularity. However, if someone redirects from their site during a mention instead, the only way to discover this is to search for your domain name.

This tool is provided as is and without warranty.