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.
Before I start listing the features and capabilities, I just want to mention that this plug-in work out of the box and in most cases there is no need to touch the settings at all.
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
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