Ubersuggest

Source: NeilPatel.com / Ubersuggest

What Is Ubersuggest?
Ubersuggest is a free SEO tool that specializes in helping you to improve your website optimization including keyword analysis, generating keyword ideas, content ideas and backlinks data.

Ubersuggest was originally founded as a tool that scraped Google Suggest terms, recently acquired by entrepreneur Neil Patel, who has since expanded the feature set significantly.