GD Star Rating is one of the most popular plug-ins for WordPress - sophisticated rating and review system for post, pages and comments. One of the best things is that there are constant updates and development of this plug-in, as well as GD Star Rating is rich snipped ready.

List of GD Star Rating Features
- Integration into posts and pages – singe or multi-rating system
- Comment rating - comment author review using standard, single rating block (thumbs ranking)
- Author rating and review
- Multiple rating review – up to 10 different criteria
- Using standard graphics or custom graphics for ratings (stars template system)
- Set number of ranking stars
- IP or cooking protection for rating
- Rating control (per user, per IP, per comment)
- Rich snippet support
- Widget support
- Template system
- Multi-language support - English, Serbian, Spanish, Hindi, German, Italian, French, Ukrainian, Byelorussian, Russian, polish
- Support for cache plug-ins – (we’ve tested in combination with W3 Total Cache)
- Ajax dynamic loading
- Votes moderation
- Charting support with pChart library
- Saving IP and user agent data for each vote
- Additional tools for maintenance and bulk operations
This is not the full list of features, there are many more, but for sure there is no need to pay for expensive commercial rating system or CMS, because GD Star Rating offer enough and even more compared to competitors.
There is comprehensive documentation that everybody can download from official website, as well there are tutorial and guides how to use custom graphics for ratings. I personally like “Multi-Sets” which can turn simple WordPress blog into powerful review website.
There is a free and premium version, but if you budget is low, I believe that free plug-in would be more than enough, however some of the advanced features may require premium support.
There is comprehensive documentation that everybody can download from official website, as well there are tutorial and guides how to use custom graphics for ratings. I personally like “Multi-Sets” which can turn simple WordPress blog into powerful review website.
There is a free and premium version, but if you budget is low, I believe that free plug-in would be more than enough, however some of the advanced features may require premium support.
You can download plugin from official website or from WordPress extension directory.