
Description: zcal is a free and open source recurring appointment and tasks manager. It allows users to manage appointments, tasks, and events with reminders. It has a simple interface with basic calendar features.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Calendly is an online appointment scheduling software that allows users to provide clients and customers with a personalized link or embedded scheduling page to book appointments, consultations, or other meetings directly on the service provider's calendar.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API