Secure My Website - A pain-free service to add SSL to your site, for non-geeks
Ahrefs Backlink Checker - With the world's biggest index of live backlinks (over 15 trillion), Ahrefs Backlink Checker will show you the most complete backlink profile for any website.
NakedSSL - Hassle-free SSL clothes for your naked domains.
Plerdy - Plerdy is a comprehensive conversation rate optimization software that caters to professional online marketers and agencies, allow them to enhance website performance and increase revenue greatly.
redirectssl - Setup your naked (non-WWW) domain with an SSL and redirect it anywhere.
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.