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.
MailStore - MailStore Home - A 100% free single-private-user desktop solution
UptimeRobot - Free Website Uptime Monitoring
Hornetsecurity Email Archiving - Hornetsecurity Email Archiving is one of the advanced software that offers long-term, unchangeable, and secure storage of important company information, data, and flies.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Intradyn Email Archiver - Orca Email Archiver provides email archiving solution for local government and business.