Ahrefs

Ahrefs Webmaster Tools — Optimise your website and get more traffic from Google.

Ahrefs — SEO Tolls, Site Audit

[Free Course] Blogging for business — 10 video lessons on growing business via content marketing

Blogging for Business by Ahrefs — Lessons to learn grow business

Blogging for Business — Build a blog that grows your business.

Site Audit by Ahrefs — Cloud based website analysis for 100+ SEO issues

Positions Explorer — Find out what keywords your competitors rank for

ahrefs — Count and analyze backlinks to a domain