Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.
Fluentd - Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Wazuh - Open Source Host and Endpoint Security
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
logstash - logstash is a tool for managing events and logs.