Some lesser-known SEO tools I recommend include Screaming Frog. It offers a powerful website crawler to identify SEO issues like broken links, missing meta tags and redirects. Another great tool is Serpstat. It provides keyword research, rank tracking and backlink analysis, often at a more affordable price than other tools. SEOquake is a browser extension that gives you valuable SEO metrics directly from the search engine results page. You can also try CognitiveSEO for detailed backlink analysis and reporting. These tools are often overlooked but can provide deep insights and help improve your SEO strategy.