Backlink check tools are numerous, and their features are diverse too :

• IP analysis,
• Alexa Rank of the backlinkinking websites,
• PR of the pages,
• nofollow or dofollow links,
• anchor text,
• number of outbound links on the same page…

But either their free version is limited in use, either it does not give you the entire information.

For you (and only for you ;-) we found the best free existing backlink check tool (or at least we think so !!) : it’s called Link Diagnosis and it shows all backlinks for one website, with PR and follow / nofollow info. It also tells you how aged a website is, and includes site analysis features.

It also calculates the strength of the source by means of the following algorithm :

Witty ! I don't know if that formula works properly but anyway the idea is good. 

Have you tried Link Diagnosis so far ? What do you think ? I noticed sometimes it gives some out of date links,

Do you think you know a better tool ? If so share it, we'll get you a present !!