Here Is The Complete List Of World Famous Directory And Most Popular Social Bookmarking Web Sites .Submission Is Very Easy To Get Your Web Site On First Page Of Google and In All other Search Engines also a golden chance to get permanent one way dofollow backlinks 100% FREE. All sites are hosted on unique C class IP's very impressive Alexa Ranking
 
here is link:
 
United States Dofollow Social Bookmarking list