SiteCheckerTool.com - Website Analytics & Tools
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.
A1 Website Analyzer - Analyze websites and save data into XML, CSV etc. Extract data about internal linking and importance calculations, file sizes, download times, HTML validation errors etc. across entire websites.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
SiteAuditTool.com - Generate Website Audit Reports
Better Uptime - We call you when your website goes down