Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
DYNO Mapper - Create Sitemaps with the DYNO Mapper Visual Sitemap Generator.
UptimeRobot - Free Website Uptime Monitoring
A1 Sitemap Generator - A1 Sitemap Generator has been in active development and sold since 2005.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
XML-Sitemaps.com - Free Online Google Sitemap Generator.