The Avia Feedback Box is a feature request system for visitors and customers. They can suggest new ideas, vote on existing ones, and track your work progress.
At the beginning of each month a user/visitor get 10 votes to distribute. They can choose to use all their votes for one idea they really like, or spread them across between several ideas If you want to improve your product or service and also want to integrate your customers in an entertaining and playful way this is definitley a plugin you should consider!