
Description: MuPDF is a free, open source PDF viewer and toolkit. It is lightweight, fast, and cross-platform, supporting Windows, macOS, Linux, Android, and iOS. MuPDF allows you to view PDFs quickly and smoothly while using minimal system resources.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: EBookDroid is an open source document viewer for Android devices. It supports PDF, DjVu, XPS, FB2 and EPUB file formats, allowing users to view ebooks, documents and magazines on their Android smartphone or tablet.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API