Hi I am looking for a good backlink check tool which will provide a list of domains linking to a site, not all the pages that link to a site. If you have links from blogrolls for example, this shows up as hundreds of links from the same domain in Yahoo Site Explorer and other tools. I know that the new Google Webmaster page kind of does this, but it is not very comprehensive. This tool is good for showing sites which link with "nofollow" tag set http://www.backlinkwatch.com/ Thanks
Maarket Samurai is the best for checking your backlinks. It's not free but if you dig you will find it
You can check backlinks on Yahoo. It shows most of them but you will have to check if it shows domain links.