there are different software available which tells u site contains dofollow links or not...like seo for firfox..!
See the resources here: http://www.iamseo.org/link-building/get-comments-approved-dofollow-blogs/ DoFollow Diver is the best way to search.
The most basic way of finding a “dofollow†blog is to take a look at the HTML source code of the posts. If the comment URLs do not have a tag called rel=â€nofollowâ€, then it indicates a “dofollow†blog.
Hi gangadhared, Very simple, use this tool http://www.edublogfinder.com/do-follow-blog-search-engine.html
Comment Kahuna and DoFollow Diver are two ways of finding dofollow comment-allowing blogs. But I wouldnt worry about dofollow or nofollow. Google should be smart enough to know whether a link adds value or not regardless of whether it has been marked as follow or nofollow. Sometimes a nofollow link may be valuable to a human visitor but not to a search engine.
The Fast Blog finder is a great app for finding blogs, it comes with a status checker showing you if the blog is dofollow or not.
Just blog commenting is not worth enough as like relevant blog commenting. If there are many dofollow blogs and are not relevant to your niche then if won't give you much benefit as compared to nofollow blogs but with relevant contents.
I think software are search blog form wordpress and drupal blog. All of these blog have default no follow code. I have used First blog finder and Real blog finder software. Both of two are not satisfied me. They search mostly wordpress and blogger blog which are no follow defaulted. I suggest its better to search on manually on Google Blog search page www.blogsearch.google.com
just highlights the link on the page and then right click on it, after that choose view selection source or download searchstatus its a firefox addons
Use the SEO Book toolbar for Firefox. It has the "Highlight nofollow links" feature which can be used to see if links in a site are followed or not.