What are some alternatives?
When comparing MySitemapGenerator and Screaming Frog SEO Spider, you can also consider the following products
FreshRSS - FreshRSS is a free, self-hosted RSS aggregator.
Netpeak Spider - A desktop tool for fast and comprehensive technical audit of the entire website.
XmlSitemapGenerator.org - Easily create HTML, RSS and XML Sitemaps online for free.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Web-Site-Map.com - XML Sitemap Generator - Free online XML / Google Sitemap Generator. Easy to use, no need to sign-up. Good for big sites.
SEO Crawler - A web-based crawler with real-time crawl feedback.