AnswerThePublic.com: Answer the Public is a visual display of keywords according to the question word the keyword was searched by organic users. For example, when searching for “Arizona State University” a web appears grouping commonly searched questions on search engines by who, what, why, where, which, are, how, when, can and will.
Keyword.io: Similar to Answer the Public, keyword.io helps by displaying how users search for certain keywords and displays them according to ranking within search engines. However, keyword.io also displays longer search inquiries that are often curtailed within other keyword searches.
Ryte.com: Gives an overall analysis of a site’s indexability, content and assets. Ranks a site on website quality, content quality and SEO with suggestions of what to change. You must have a login and can start a trial, but may require payment for extended use.
SEMrush: SEMrush provides beginner friendly to complex SEO tools. SEMrush also helps users plan future marketing efforts using SEO strategies. You must have a login and may have to pay for the service.