I Recommend This
Enable your visitors to easily like or recommend your posts with a single click,...
Disqus Comment System
Disqus is the web's most popular comment system. Use Disqus to increase eng...
Votely by WPGens
Adds simple poll/vote/opinion system at the end of post that helps your content ...
HelpfulnessMeter
Improve your WordPress content easily with HelpfulnessMeter, effectively collect...