Powerful Tools For SEO
 

Moz
Semrush
Buzzsumo
Screamingfrog
Ubersuggest
Ahref

I would like to suggest you that three tools who are strong for SEO.

1) Keywords planner Tools - This is the one of the best tool where you will be able to find keywords for your website.
2) Google Analytics Tools - Google Analytics Tool is also strong tool where you will be able for find your traffic data details.
3) Google Webmaster tools - Google webmaster tools is also a strong tools where you will be able for generate health reports.