Cronitor - Monitor cron jobs, micro-services, daemons and almost anything else, no setup required. Easier cron troubleshooting and no more silent failures.
HTTPDump - A simple, beautiful Webhook debugging tool.
Trello Calendar Connector by Cronofy - See and Organize your Trello deadlines inside your calendar
httpbin(1) - HTTP request and response service
Agile Guy for Trello - The Swiss army knife for agile teams!
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.