What are some alternatives?
When comparing DYNO Mapper and Really Good UX, you can also consider the following products
WonderWebWare Sitemap Generator - Sitemap Generator is freeware program that will help you to automatically generate site maps for google, bing and yahoo in their respective file formats.
FlowMapp - UX planning tool for creating a visual sitemap
UX Archive Animated - iOS apps animated user flows
Screaming Frog SEO Spider - The Screaming Frog SEO Spider is a small desktop program (PC or Mac) which crawls websites’ links...
VisualSitemaps - Autogenerate visual sitemaps in seconds.
A1 Sitemap Generator - A1 Sitemap Generator has been in active development and sold since 2005.