The Fivestar module allows administrators and site designers to add a clean, attractive voting widget to content in Drupal 7. It features:

- jQuery rollover effects and AJAX no-reload voting
- Configurable star sets
- Graceful degradation to an HTML rating form when JavaScript is turned off
- Support for anonymous voters
- Spam protection to keep users from filling your DB with bogus votes
- Easy-to-use integration with Views module for lists sorted by rating, or filtered by min/max ratings

Developed by Lullabot.