What are some alternatives?
When comparing Rarchy and FlowMapp, you can also consider the following products
SlickPlan - Slickplan is a suite of tools for planning any website project.
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.
Really Good UX - A library of screenshots for UX inspiration
VisualSitemaps - Autogenerate visual sitemaps in seconds.
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.