Here are some SEO tools that are commonly used and have been around for some time:

1. Google Analytics: A free web analytics tool that allows website owners to track and analyze their website traffic and user behavior.
2. Google Search Console: A free tool that helps website owners monitor and maintain their site's presence in Google search results. It also provides information about search queries, crawl errors, and site performance.
3. SEMrush: A popular all-in-one SEO tool that allows users to conduct keyword research, track website rankings, analyze competitor websites, and monitor backlinks.
4. Ahrefs: A comprehensive SEO toolset that allows users to conduct keyword research, analyze backlinks, track website rankings, and identify content opportunities.
5. Moz Pro: A suite of SEO tools that includes features such as keyword research, site audits, rank tracking, and link analysis.
6. Yoast SEO: A popular plugin for WordPress that helps users optimize their website for search engines. It includes features such as content analysis, XML sitemap generation, and meta-tag optimization.
7. Screaming Frog SEO Spider: A website crawling tool that helps users identify technical SEO issues, such as broken links and duplicate content.
8. Majestic SEO: A link analysis tool that helps users identify high-quality backlinks and analyze link profiles.
9. Google Keyword Planner: A free tool that allows users to conduct keyword research and identify search volume and competition for specific keywords.
10. Serpstat: A comprehensive SEO tool that includes features such as keyword research, site analysis, rank tracking, and backlink analysis.