ThingSpeak - Open source data platform for the Internet of Things. ThingSpeak Features
Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
Knowi - Knowi is an augmented analytics platform that instantly connects to any data, anywhere, and exposes previously unseen insights through AI to accelerate your business success.
UptimeRobot - Free Website Uptime Monitoring
AWS IoT Analytics - IoT Management
UptimeRobot App - Web, SSL, ports & Cron-jobs monitoring