Best and SEO optimized List of dofollow forums for bloggers to increase backlinks is given here for your easy access:
http://www.v7n.com/forums/
http://www.siteownersforums.com/index.php
http://forum.joomla.org/
http://www.cnet.com/forums/
http://forums.mysql.com/
https://forums.digitalpoint.com/
https://www.sitepoint.com/community/
http://www.warriorforum.com/
http://ask.shoutmeloud.com/
http://forum.deviantart.com/
http://filesharingtalk.com/forum.php
http://www.geekvillage.com/forums/index.php
http://www.htmlforums.com/index.php?
http://mygamebuilder.com/forum/
https://www.phpbb.com/community/
https://www.webhostingtalk.com/
http://www.v7n.com/forums/
http://www.siteownersforums.com/index.php
http://forum.joomla.org/
http://www.cnet.com/forums/
http://forums.mysql.com/
https://forums.digitalpoint.com/
https://www.sitepoint.com/community/
http://www.warriorforum.com/
http://ask.shoutmeloud.com/
http://forum.deviantart.com/
http://filesharingtalk.com/forum.php
http://www.geekvillage.com/forums/index.php
http://www.htmlforums.com/index.php?
http://mygamebuilder.com/forum/
https://www.phpbb.com/community/
https://www.webhostingtalk.com/