What are some alternatives?
When comparing Tiny Tiny RSS and Web-Site-Map.com - XML Sitemap Generator, you can also consider the following products
Feedly - The content you need to accelerate your research, marketing, and sales.
XML-Sitemaps.com - Free Online Google Sitemap Generator.
Inoreader - Dive into your favorite content. The content reader for power users who want to save time.
MySitemapGenerator - Online XML Generator for SEO and eCommerce. Creates XML Sitemaps, Shopping Feeds, RSS.
NewsBlur - NewsBlur is a personal news reader that brings people together to talk about the world.
XmlSitemapGenerator.org - Easily create HTML, RSS and XML Sitemaps online for free.