Trello Calendar Connector by Cronofy - See and Organize your Trello deadlines inside your calendar
Site Down - Site down outage and downtime reports from SiteDown.co
Bringschuld - Simple periodic task and email monitoring
Is it up? - A simple tool to check if a website or ip address is up or down.
Cronitor - Monitor cron jobs, micro-services, daemons and almost anything else, no setup required. Easier cron troubleshooting and no more silent failures.
downinspector.com - Find out if a website is down for everyone or just you.