
Description: Pdf Viewer Plus is a free PDF viewer, editor and annotation tool. It allows you to view, edit, sign, and annotate PDF documents on Windows devices. Key features include tabbed PDF reading, editing text and images, adding signatures and comments, highlighting and underlining text.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Okular is a versatile document viewer software for KDE. It supports viewing PDFs, EPUBs, ODT, and other document formats. Okular allows annotating, highlighting, commenting on documents as well as filling forms.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API