Tools for SEO:
Ahrefs:
This tool allows you to constantly monitor and verify links pointing to a website. It also provides a large amount of very useful data for analyzing competing sites.
SEMrush:
SEMrush helps track your ranking on search engines, and a lot of data is provided like the ranking of sites that are positioned on the same keyword.
Cocoon:
This is a visualization tool that analyzes the internal architecture of a site that lets you know what a crawler sees when it scans your page, and it also provides interactive views that provide you information on the structure of your site.
Gephi:
This is an open source and free software which helps you to analyze data from a website, it is used to study structures of pages on a site.
SeRanking:
It offers a set of practical features that perform a full site audit such as, real-time keyword positioning tracking and monitoring.