Most Popular Wordpress Plugins

List of most popular 15 WordPress Plugins for SEO purpose. 

Google XML Sitemaps

W3 Total Cache

WordPress SEO by Yoast

Better WP Security

Contact Form 7

NextGEN Gallery

Advanced Custom Fields

Google Analytics for WordPress

All in One SEO Pack

ShareThis: Share Buttons and Social Analytics

Meta Slider

Captcha

Yet Another Related Posts Plugin

WP e-Commerce