1. Jetpack by WordPress.com

 

2. WordPress SEO by Yoas

 

3. iThemes Security (formerly Better WP Security)

 

4. WooCommerce – excelling eCommerce

 

5. Google Analytics by Yoast

 

6. NextGEN Gallery

 

7. All in One SEO Pack

 

8. Google Analytics Dashboard for WP

 

9. WordPress Importer

 

10 iThemes Security (formerly Better WP Security)