Google Structured Data Testing Tool - Google Structured Data Testing Tool
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.
One Hour Indexing - One Hour Indexing is a powerful, automated service that indexes and pings your backlinks. It's 100% Google safe and gives guaranteed ranking results
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.
Semrush Authority Score Explained - Find out how Semrush Authority Score may help you to get better at your link building efforts when looking for quality domains, and improving your own website‘s authority.
PrepostSEO Guest Posting - Daily Updated (10-30 sites added daily)- Publish Guest Posts at high authority guest posting sites (blogs). All premium websites listed.