XML-Sitemaps.com - Free Online Google Sitemap Generator.
Netpeak Spider - A desktop tool for fast and comprehensive technical audit of the entire website.
A1 Sitemap Generator - A1 Sitemap Generator has been in active development and sold since 2005.
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.
SEO Crawler - A web-based crawler with real-time crawl feedback.