Below is a small collection of the best WordPress plugins that we use every day.

Analytics: 

Google Analytics Dashboard For WP

Comments:

Disqus Comment System
Facebook Comments

eCommerce: 

WooCommerce – Excelling eCommerce

Site Migration / Backup:

WP Clone by WP Academy
Duplicator

YouTube:

YouTube Channel

Facebook: 

Better Facebook Page Box
Top Shared Posts on Facebook

Social Sharing:

Add This Sharing Buttons
Easy Social Share Buttons For WordPress