UserVoice is a Customer Feedback system that makes it easy for your users to report bugs and vote on new features. From their website:
“UserVoice allows your customers to vote on feedback and ideas submitted in the customer community. There is a limit on the number of votes a user can spend at any given time. When a customer creates an account, they are given 10 votes they can use as they see fit.”
This plugin makes it easy to incorporate the UserVoice customer feedback system on your posts and pages without editing templates.
Once you have installed UserVoice, navigate to the edit screen for any post or page on your site and scroll down to see the UserVoice configuration options for that post or page.
Free Download: Download this wp-plugin