It is a fact that over 90% the web sites out there do not allow dofollow links to be added by visitors. While I am frustrated with the lack of good places to add dofollow links to my site, I am also curious about where my competitors get their backlinks. Is there a good tool or method to find out where the backlinks of my competitors are? So I can at least find out some of the good places and add my own backlinks. Any good answer is appreciated! Thanks!