What are some alternatives?
When comparing MySitemapGenerator and ContentKing, you can also consider the following products
FreshRSS - FreshRSS is a free, self-hosted RSS aggregator.
Marketing 360 - Marketing 360® is a powerful marketing and website platform built for any size brand. It's fully managed and has everything a brand needs to drive beautiful marketing and sales.
XmlSitemapGenerator.org - Easily create HTML, RSS and XML Sitemaps online for free.
AgencyAnalytics - AgencyAnalytics is an all-in-one dashboard with: SEO tools, rank tracking, backlink monitoring, social media, PPC analytics + more. Get 14 Days Free!
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.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.