We all know that Google is highly value links that com from websites that have .edu or .gov domains. Today we have a bunch of programs, or sites that use these programs, to find sites that have .edu or .gov domains. There is an easier, better and above all free ancin to find these sites, and all with Google.
Simply, in Google search box, type : site: .edu and keywords that interest you.
And that's it, Google will provide a list of sites .edu sites that have links with your keywords. In this way you can even search blogs, just after the key word type blog : site: .gov your keyword blog.
Type in search box: site: .edu human heart blog
And that's it, Google will give you a list of all .edu blogs that have links with the human heart.
This is the best and most simple, but above all a free way to find these sites and blogs. No need to pay someone for a program, to join some sites or leave email to someone. Google allows you all this free and you can be sure of the results.