This is a compilation of SEO tools that I have experienced using. I will keep this list updated from time to time.
SEMrush is a powerful and versatile competitive intelligence suite for online marketing, from SEO and PPC to social media and video advertising research.
Xenu’s Link Sleuth is a spidering software that checks Web sites for broken links. It performs verification on normal links, images, frames, backgrounds, and local image maps. It also displays a continuously updated list of URLs that you can sort by different criteria. Users can request reports at any time. This program supports SSL Web sites and partial testing of FTP and gopher sites and can detect and report redirected URLs.
The Screaming Frog SEO Spider is a website crawler, that allows you to crawl websites’ URLs and fetch key onsite elements to analyze onsite SEO. Download for free, or purchase a license for additional advanced features.
Copyscape provides a free plagiarism checker for finding copies of your web pages online, as well as two more powerful professional solutions for preventing content theft and content fraud.
Ahrefs is a toolset for SEO & marketing running on Big Data. We cover backlink checking, competitor analysis, keyword research and more.
Feel free to leave in the comments below if you have discovered a great SEO tool and I will try to check that out.