List of High PR Dofollow Backlinks High DA Dofollow Backlinks
List of High PR Dofollow Social Bookmarking Sites, High DA Dofollow Social Bookmarking Sites, High Quality Dofollow Social Bookmarking Sites
Social Bookmarking helps your content found and indexed very fast by search engines. Most of these social bookmarking sites are High PR and High DA.
Internet is always changing and with the course of time the dofollow status of some of these websites can change.
But let me tell you that nofollow links are also important as they surely can drive an insane amount of traffic to your site. Matt Cutts explains this in video below: