FlowMapp - FlowMapp is a UX planning tool for creating visual sitemaps and user flow.
A1 Sitemap Generator - A1 Sitemap Generator has been in active development and sold since 2005.
XML-Sitemaps.com - Free Online Google Sitemap Generator.
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.
Site Visualizer Professional - Crawl website, visualize pages and links, analyze the structure of a website, build SEO reports with SQL
VisualSitemaps - Autogenerate visual sitemaps in seconds.