This is an updated list with high pr dofollow forums that allows backlinks in signature, profile and threads content. For those who want to increase backlinks to their websites, this is one of the most used and efficient link building strategy. Don't SPAM! 
PR9 Forums
PR8 Forums
http://forum.joomla.org/
PR7 Forums
https://www.phpbb.com/community/
PR6 Forums
http://www.sitepoint.com/forums/
http://www.webmasterworld.com/
http://www.webmaster-talk.com/
http://forums.hostgator.com/
http://ubuntuforums.org/
http://forums.mysql.com/
http://forum.deviantart.com/
PR5 Forums
http://www.theadminzone.com/forums/
http://www.webhostingtalk.com/
http://www.dnforum.com/
http://forums.seochat.com/
http://www.delphiforums.com/
PR4 Forums
http://www.htmlforums.com/
http://www.v7n.com/forums/
PR3 Forums
http://affiliate-marketing-forums.5staraffiliateprograms.com/
http://www.siteownersforums.com/
Okay :) so every forum listed above has been checked by me using http://www.prchecker.info/ , there's a chance their forum's PR may drop or increase, also some may discontinue their service, some may turn to be nofollow, some don't let you put signatures any more, some don't let you put link in your profile and so on.
When you notice that kindly hit a reply to this thread and I'll update this list right away.
Never waste your time with nofollow forums, because all you get is traffic, they don't pass page rank.
If you're looking for traffic is okay, if you looking for link juice you're wasting your time.
If you know other High PR Dofollow Forums you must share it, I'll also updated the list. Thanks!
PR9 Forums
PR8 Forums
http://forum.joomla.org/
PR7 Forums
https://www.phpbb.com/community/
PR6 Forums
http://www.sitepoint.com/forums/
http://www.webmasterworld.com/
http://www.webmaster-talk.com/
http://forums.hostgator.com/
http://ubuntuforums.org/
http://forums.mysql.com/
http://forum.deviantart.com/
PR5 Forums
http://www.theadminzone.com/forums/
http://www.webhostingtalk.com/
http://www.dnforum.com/
http://forums.seochat.com/
http://www.delphiforums.com/
PR4 Forums
http://www.htmlforums.com/
http://www.v7n.com/forums/
PR3 Forums
http://affiliate-marketing-forums.5staraffiliateprograms.com/
http://www.siteownersforums.com/
Okay :) so every forum listed above has been checked by me using http://www.prchecker.info/ , there's a chance their forum's PR may drop or increase, also some may discontinue their service, some may turn to be nofollow, some don't let you put signatures any more, some don't let you put link in your profile and so on.
When you notice that kindly hit a reply to this thread and I'll update this list right away.
Never waste your time with nofollow forums, because all you get is traffic, they don't pass page rank.
If you're looking for traffic is okay, if you looking for link juice you're wasting your time.
If you know other High PR Dofollow Forums you must share it, I'll also updated the list. Thanks!
