DoFollow link are the link that will pass their ranking. A blog or site that has good pagerank and DoFollow attribute will pass their page rank to wherever the link goes. In other word, we can say that DoFollow is hyperlink attribute that will tells search engines to pass on any credibility to an outbound link. Wherever the link are come from (e.g. blog post, comment), if a blog has enables the dofollow link with no extrenal rel="nofollow", they will help you to improve your search engine ranking results and getting backlink to your site.
The problem with enabling dofollow link is the increasing number of comment spam and its the main reason why most blog software has "nofollow" tags enabled by default
Here's the typical of search engine that follow and not follow NoFollow Links
Here's the number of ways where you can check and find a blog that has dofollow link
1. The most basic way of finding a "dofollow" blog is to take a look at the HTML source code. You can simply doing this by right click on the page and click on "View Page Source" search it among the source code by pressing and hold down CTRL + F and find rel="nofollow" or nofollow.
2. Go to EZ Business Needs and search it by using the keyword that you desired
3. Finding the DoFollow Blog via Google Search. Go to Google Image Search and find it using the keyword "You Comment I Follow" or "U Comment I Follow" with quotation. Usually a blog that has this image, has enables their dofollow link
4. If you are a true fans of Firefox Browser then you could install SearchStatus, SEOQuake, and NoDoFollow. It doesn't matter whether you decide to install only some of these.
5. Go to the directory where you can see a "dofollow" blogs only
6. Go to my list collection
7. Do a search on Google, MSN, Yahoo and any kind of search engine site using this keyword
To Find DoFollow Blog on Blogspot
“inurl:blogspot.com" "intext:do follow”
You can replace blogspot with wordpress if you desire to find dofollow blog on wordpress
Additionally, you can submit your article to social media site that will pass their pagerank to your site
Here's List of DoFollow Social Media Sites: