WpSmushPro
WpSmush Pro is the fastest and most efficient image compression plugin for WordPress worth $588.
iThemes Security Pro
iThemes Security Pro is an industry wide used security plugin worth $80 which comes with 30 plus security features all included in a single package.
WpRocket
WpRocket is a premium WordPress performance plugin worth $39. It implements measures such as page speed optimization and caching to make your website blazing fast.
Akismet Spam Protection
Akismet is a spam protection service worth $60 which automatically filters out user generated data such as comments and contact form submissions.
KeyCDN
KeyCDN is one of the best Content Delivery Networks available. It serves your website’s static resources such as images and CSS/Javascript files from geographically distributed locations to your users. This ensures data transfer with low latency and high speeds.