iThemes Security - Security plugin that provides over 30+ ways to secure and protect your WordPress site.
Hide My WP Ghost - Hide My WP Ghost is a WordPress Security plugin. Changes and hides WordPress common paths for the Best WP Security against hacker’s bots. The plugin works like security through obscurity solution for a WP website.
NinjaFirewall (WP Edition) - A true Web Application Firewall to secure and protect WordPress.
Sucuri - Website Protection, Malware Removal, and Blacklist Prevention
Wordfence - Comprehensive security plugin for WordPress.
WP Hide & Security Enhancer - Similar name but is a different program. Protects Wordpress sites by changing or hiding addresses of common points of attack - can also be used to deactivate unused functions and hide that the site is run by Wordpress. More info www.wp-hide.com.