SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.

Vanido - Vanido is a singing coach in your pockets.

Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.

Singscope - See your pitch analyzed as you sing

SEOquake - SEOquake provides a browser extension to conduct on-page SEO audit.

Listening Singing Teacher - Listening Singing Teacher helps you to sing in tune and in rhythm.