XML-Sitemaps.com - Free Online Google Sitemap Generator.
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.
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.
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.
PowerMapper - Create visual HTML site maps and XML sitemaps for search engines of any web site quickly and easily.