Useful Links & Tools
Fast , (Check the current speed of your internet connection)
What's My Browser , (Tells you what browser and version you have, the type of device you are using, which operating system you're using)
GTmetrics , (Measure your site performance and web vitals)
Experte , (Pagespeed checker that allows you to automatically test up to 500 URLs)
Builtwith , (Find the web hosting company, e-mail provider and everything else about a website)
Manage Engine , (Many free tools for Network, DevOps and Site Reliability Engineers)
W3C , (W3C is leading the web to its full potential by developing protocols and guidelines that ensure the long-term growth of the web)
Let's Encrypt , (Let’s Encrypt is a free, automated, and open certificate authority [CA], run for the public’s benefit. It is a service provided by the Internet Security Research Group)
Certbot , (Certbot is a free, open source software tool for automatically using Let’s Encrypt certificates on manually-administrated websites to enable HTTPS)
Certify The Web , (Certify The Web is a free management ACME automated https certificates for IIS, Windows and other services)
Posh-ACME , (Create publicly trusted SSL/TLS certificates)
SSL Labs , (SSL Labs is a collection of documents, tools and thoughts related to SSL)
An Introduction to Multilingual Web Addresses
Chrome , (Internationalized Domain Names [IDN] in Google Chrome)
Mozilla , (Mozilla IDN Display Algorithm)
Carrd.co , (Build one-page fully responsive websites in minutes that look good on every screen)