http://knowem.com – Check if your name, business or otherwise, is available on social media platforms, as a domain name, and as a USPTO trademark
https://wordpress.org/ – The Official Home of WordPress
https://developer.wordpress.org/resource/dashicons/#dashboard – Want to use icons on your WordPress website?
http://semperplugins.com/doc-type/video/ – Video tutorials for the highest rated SEO plugin for WordPress
https://wordpress.org/plugins/w3-total-cache – Most websites will benefit from this plugin; it may conflict with parts of your website or or not be ideal depending on how your website and hosting are setup
http://www.elegantthemes.com/gallery/divi/documentation/ – Getting started with the Divi theme and the Divi builder for any theme
https://www.sitelock.com – A good preventive step toward preventing hacking on your site. They can also help fix your site if it gets hacked.
https://www.wordfence.com/learn/ – A fantastic resource to learn more about WordPress Security, including content for beginners
https://developers.google.com/speed/pagespeed/insights/ – Check out your website speed
https://gtmetrix.com/ – Another great tool to check out your website speed and other metrics
http://www.speedtest.net/ – Is your website slow or is it just your current internet connection speed? Check your internet connection speed.
https://www.google.com/analytics – Check out your website traffic and gauge the effectiveness of your marketing efforts.
https://www.canva.com/ – Do you create social media? Create better content easily with this online software.
http://intodns.com/ – IntoDNS checks the health and configuration and provides DNS report and mail servers report.
http://www.videvo.net/ – Great resource for free video clips.