Cronitor - Monitor cron jobs, micro-services, daemons and almost anything else, no setup required. Easier cron troubleshooting and no more silent failures.
Loxi - Easily add an events calendar to any website.
Trello Calendar Connector by Cronofy - See and Organize your Trello deadlines inside your calendar
Event Calendar App - A simple, easy to manage, way of displaying events
Agile Guy for Trello - The Swiss army knife for agile teams!
LaMetric Time - Internet-connected clock makes your space unique.