I recently ran a lookup of all my back-links. I used the "Small Seo Tools" back-link checker and it listed about 290 back-links. At first I was very excited but then I saw that many of them were from the same few sites and I started worrying. Here are some domains of the results ( they are all .com but I didn't want to advertise for them.) pagelearns homepagewert w3snoop There were some others but you get the idea. In each case the domains are either "Domain Research Tools" or "Website Value Calculators" and in each case there are dozens of back-links to my site. The links are in lists of "Similar Sites" and "Recently Viewed" My question is, will these sites impact my SEO negatively? They appear spammy to me but the listing is not directly within my control. If they are bad is dis-avowing the best approach? Thank you in advance.