
Description: Atril is a document viewer application for Linux designed to view PDF and other file formats. It features a simple, clean interface, continuous scrolling, thumbnail preview, bookmarking, annotations, and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Free Opener is a free, open-source file viewer and converter software for Windows. It allows you to view over 300 file formats such as documents, spreadsheets, presentations, images, and more. It also lets you convert between common file formats.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API