Mockupify - Automate your print-on-demand product creation process
WP Rocket - WP Rocket offers a caching plugin for Wordpress.
Muglaunch.com - Design and sell print on demand products easily @ Muglaunch
Yoast - Yoast offers plugins to improve SEO and optimize web sites and blogs.
Revscale - Sales Automation - A holistic sales & mkt automation and B2B lead generation software
Wordfence - Comprehensive security plugin for WordPress.