Foxit Reader
Free Personal
Foxit Reader is a lightweight, fast PDF Reader.
Adobe Acrobat Reader DC
Freemium
Adobe Acrobat Reader DC is the industry standard for viewing, printing, signing and commenting on PDF documents.
Firefox PDF Viewer (PDF.js)
Open Source
PDF.js. A general-purpose, web standards-based platform for parsing and rendering PDFs.
Skim
Open Source
Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF.
Chrome PDF Viewer Plug-in is a built-in PDF viewer in chrome.
calibre
Open Source
Calibre is an Ebook management software.
FBReader
Open Source
FBReader is a free ebook reader. Main ebook formats: ePub (including main features of ePub3), Kindle azw3 (mobipocket), fb2(.zip).
Preview
Free
Preview is the image viewer and PDF viewer of the macOS operating system.
WinDjView
Open Source
WinDjView is a fast, compact and powerful DjVu viewing application for the Windows.
EPUBReader
Free
EPUB is an e-book file format with the extension .epub that can be downloaded and read on devices like smartphones, tablets, computers, or e-readers.
Compare Okular with alternatives
Compare Foxit Reader and Okular and decide which is most suitable for you.
Compare Adobe Acrobat Reader DC and Okular and decide which is most suitable for you.
Compare Firefox PDF Viewer (PDF.js) and Okular and decide which is most suitable for you.
Compare Chrome PDF Viewer Plug-in and Okular and decide which is most suitable for you.