SEO Analyzer By Neil Patel - A free SEO analyzer for your site
Octopus.do - Build your website structure in real-time and rapidly share it to collaborate with your team or clients. Start prototyping websites or apps instantly.
SE Ranking - All-in-One cloud-based SEO software for agencies, marketing teams and webmasters
PowerMapper - Create visual HTML site maps and XML sitemaps for search engines of any web site quickly and easily.
Free SEO Checker by Spotibo - An SEO checker that analyses based on Google's algorithm 👀
FlowMapp - FlowMapp is a UX planning tool for creating visual sitemaps and user flow.