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.
A1 Sitemap Generator - A1 Sitemap Generator has been in active development and sold since 2005.
XML-Sitemaps.com - Free Online Google Sitemap Generator.
Web-Site-Map.com - XML Sitemap Generator - Free online XML / Google Sitemap Generator. Easy to use, no need to sign-up. Good for big sites.
VisualSitemaps - Autogenerate visual sitemaps in seconds.