
Description: Simple Calendar is a free and open source calendar app for Android. It has a clean interface for viewing and managing events, supports calendar sync, custom reminders, and an optional weather widget. Simple Calendar is lightweight, customizable, and respects user privacy.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Rainlendar is an open source desktop calendar application for Windows, Mac and Linux. It supports calendar events, tasks, and weather information. Rainlendar is lightweight, customizable, and supports online calendar integration.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API