Platypus - Realtime server monitoring and reporting
WebGazer - Monitor your website's availability with WebGazer, review its performance and get instant notifications when your website goes down. No installation required and free plan available.
Monitornator - Server monitoring made simple
Oh Dear! - Website monitoring, without the hassle
NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.
Freshworks - Delight your customers, from wherever you are