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SumatraPDF is a multi-format (PDF, EPUB, MOBI, CBZ, CBR, FB2, CHM, XPS, DjVu) reader for Windows under (A)GPLv3 license, with some code under BSD license (see AUTHORS).

The official source code repository for the calibre ebook manager

js is a Portable Document Format (PDF) viewer that is built with HTML5.

Document online preview project solution, built using the popular Spring Boot framework for easy setup and deployment. This versatile open source project provides basic support for a wide range of document formats, including:

Terminal JSON viewer & processor

JSON Hero is an open-source, beautiful JSON explorer for the web that lets you browse, search and navigate your JSON files at speed. 🚀. dev team.

JavaScript image gallery for mobile and desktop, modular, framework independent