Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
WP Rocket - WP Rocket offers a caching plugin for Wordpress.
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.
Yoast - Yoast offers plugins to improve SEO and optimize web sites and blogs.
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Wordfence - Comprehensive security plugin for WordPress.