Foxit Reader
Free Personal
Foxit Reader is a lightweight, fast PDF Reader.
Firefox PDF Viewer (PDF.js)
Open Source
PDF.js. A general-purpose, web standards-based platform for parsing and rendering PDFs.
Chrome PDF Viewer Plug-in is a built-in PDF viewer in chrome.
Adobe Acrobat Reader DC
Freemium
Adobe Acrobat Reader DC is the industry standard for viewing, printing, signing and commenting on PDF documents.
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.
Compare Xodo with alternatives
Compare Adobe Acrobat Reader DC and Xodo and decide which is most suitable for you.
Compare Firefox PDF Viewer (PDF.js) and Xodo and decide which is most suitable for you.
Compare Chrome PDF Viewer Plug-in and Xodo and decide which is most suitable for you.