What are some alternatives?
When comparing WonderWebWare Sitemap Generator and A1 Sitemap Generator, you can also consider the following products
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.
XML-Sitemaps.com - Free Online Google Sitemap Generator.
GlooMaps - Create your visual sitemap on the go - easy peasy
FlowMapp - UX planning tool for creating a visual sitemap
Screaming Frog SEO Spider - The Screaming Frog SEO Spider is a small desktop program (PC or Mac) which crawls websites’ links...
XmlSitemapGenerator.org - Easily create HTML, RSS and XML Sitemaps online for free.