Since DoFollow Backlinks are of such importance in terms of Web Site Promotion many Search Engines have been developed to specifically look for DoFollow Blogs. These “DoFollow Search Engines”, when searched through, will Result in Blogs that have DoFollow Comments enabled. Since the Comments are DoFollow you may post a Link back to Your Site (a Backlink), which will count toward Your Site’s PageRank. Here is a List of DoFollow Search Engines…

CommentHunt.com
DoFollow.RadPixels.com
Performancing.com/DoFollow-Search-Engine
InlineSEO.com/DoFollowDiver/
W3ec.com/DoFollow/
WMTips.com/Tools/DoFollow-Search-Engine/
DoFollowSearch.com/
DigeratiMarketing.co.uk/Tools/Do-Follow-Search-Engine/
EzBusinessneeds.com/DoFollow.php
HippoWebSolutions.com/DoFollow-Search-Tool/
BestRealIncome.com/DoFollowSearch.htm
BloggTag.com/en/DoFollow-Search/
DoFollowSearchEngine.com
FollowTopia.com
CommentLinkBuilding.info