Okular - Okular is a universal document viewer based developed by KDE.
Parascript - Parascript is an AI-powered Intelligent Document Processing software that makes it possible for you to automate the extraction of data from any type of document, whether it’s a contract, a form, or an invoice.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
Kofax TotalAgility - Kofax TotalAgility Platform transforms and simplifies information-rich customer interactions via the world’s first unified digital transformation platform.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
ABBYY Vantage - ABBYY Vantage is an Intelligent Document Processing (IDP) platform that enables the digital workforce to automate the entire document processing cycle from data capture and analysis to document creation and sharing.