Jetpack - Jetpack offers SEO and security plugins for Wordpress.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
WP User Manager - The most customizable profiles, community builder and membership WordPress plugin
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
UpStream Plugin - UpStream Plugin is a free-to-use project management plugin that allows you to manage various types of projects right from your WordPress site.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode