What are some alternatives?
When comparing Web-Site-Map.com - XML Sitemap Generator and WonderWebWare Sitemap Generator, you can also consider the following products
MySitemapGenerator - Online XML Generator for SEO and eCommerce. Creates XML Sitemaps, Shopping Feeds, RSS.
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.
XmlSitemapGenerator.org - Easily create HTML, RSS and XML Sitemaps online for free.
XML-Sitemaps.com - Free Online Google Sitemap Generator.
A1 Sitemap Generator - A1 Sitemap Generator has been in active development and sold since 2005.
FreshRSS - FreshRSS is a free, self-hosted RSS aggregator.