Freshping (Formerly Insping)

FREE forever features of Freshping

50 URLs monitored every minute for downtime
5 Public status pages (configurable)
Multi-user login & 30 users
10 Global locations: Understand how your websites status and response time for customers located across the globe
Apdex reporting
In-depth reports, Outage history & Global latency
Email, Twilio (SMS), Freshdesk,