Lampyre - Lampyre - an efficient data analysis and OSINT multi-tool for everyone.
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.
Sentinel Visualizer - Link Analysis, Data Visualization, Geospatial Mapping, and Social Network Analysis (SNA) with Sentinel Visualizer
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
SIREN.io - Siren is an investigative intelligence platform.
Better Uptime - We call you when your website goes down