Warmbox.ai - Warm up your cold email inbox, and never land in spam anymore!
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.
Skedda - Offices, co-working spaces, universities, sports venues, studios & churches are just some of the places that manage the use of their desks, rooms, courts, studios, halls and all other 'spaces' with Skedda
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring