What are some alternatives?
When comparing phpSitemapNG and SEO Magnifier, you can also consider the following products
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.
SEO PowerSuite - Get all SEO tools in one pack - download free edition of SEO PowerSuite and get top 10 rankings for your site on Google and other search engines!
XML-Sitemaps.com - Free Online Google Sitemap Generator.
A1 Sitemap Generator - A1 Sitemap Generator has been in active development and sold since 2005.
WonderWebWare Sitemap Generator - Sitemap Generator is freeware program that will help you to automatically generate site maps for google, bing and yahoo in their respective file formats.
GlooMaps - Create your visual sitemap on the go - easy peasy