Cronitor - Monitor cron jobs, micro-services, daemons and almost anything else, no setup required. Easier cron troubleshooting and no more silent failures.

Trello Calendar Connector by Cronofy - See and Organize your Trello deadlines inside your calendar

UptimeRobot - Free Website Uptime Monitoring

Agile Guy for Trello - The Swiss army knife for agile teams!

Cronhub - Cronhub helps you to easily monitor all your cron jobs in a beautiful dashboard. It alerts you when your cron job doesn't run on time or it fails.

Freelance.watch - As a freelancer or agency, juggling existing projects while finding new ones is always a headache.