
Description: Calvertr is an open-source alternative to Microsoft Excel designed for creating spreadsheets, analyzing data, and performing calculations. It offers a familiar spreadsheet interface with many of the same features as Excel.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Converter NOW is a free online file conversion tool that supports converting documents, images, audio, video, ebook, and archive files between over 1200 different formats. It provides a simple interface to upload files and convert them quickly.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API