Simply static is a static site generator for WordPress which helps you creating the most secure and performance-optimized version of your website.
Passster fixes WordPress password protection. It let you protect pages, posts or just parts of it with a password, captcha, Google ReCaptcha and more.
Distancr let you modify your store based on the customers location. Modify prices, product availability, shipping methods and payment gateways based on location.
I create new tutorials every week to help you get things done and learn every detail about how to use my plugins.
With now over 45 articles there is a pretty good chance that there is something helpful for you. If not take the time and check the extensive documentation.