iAnnotate PDF!

Foxit Reader is a free and light-weight multi-platform PDF document viewer. Its core function is compatible with PDF Standard 1.7.

Evince is a document viewer for multiple document formats. It currently supports pdf, postscript, djvu, tiff, dvi, cbr, cbz, etc.

Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit, and sign PDF files at your desk or on the go.

Xodo is the ultimate cross-platform PDF viewer and annotator. And it’s 100% free.

With GoodReader on your iPhone, iPod Touch or iPad, you can read virtually anything, anywhere. Books, movies, maps, pictures; GoodReader puts it all in a single app, right in your pocket.

Notability is the first truly integrated note-taking app for iOS. Standing on a framework that automatically links notes with audio recordings, Notability supports all of your note-taking needs -- handwriting, PDF annotation, word processing, and more work together seamlessly allowing you to create comprehensive, beautiful notes, quickly and simply. Auto Sync ensures your notes are backed up safely. And now you can personalize the look and feel of Notability’s library and toolbars with Themes, from colorful, to clean, to classic. »

PDF Expert lets you read and annotate PDF documents, highlight text, make notes and save these changes being compatible with Preview and Adobe Acrobat. Moreover, PDF Expert is the only iPhone application that can fill PDF forms!

The Flipping PDF Reader allows to read PDF documents in user friendly interface with flipping book effect. Good looking and convenient alternative for Adobe PDF Reader.

Atril is a simple multi-page document viewer. It can display and print PostScript (PS), Encapsulated PostScript (EPS), DJVU, DVI, XPS and Portable Document Format (PDF) files. When supported by the document, it also allows searching for text, copying text to the clipboard, hypertext navigation, and table-of-contents bookmarks. Atril is a fork of Evince.

Wondershare PDFelement is a professional PDF tool that enables users to edit text, images, objects on PDF, merger or split a PDF file, convert PDF to MS Word, edit and fill out PDF forms.

ezPDF Reader is a PDF viewer with some powerful features such as TTS (Text-to-Speech), annotations and PDF forms.

Need PDF viewing software? PDF Studio Viewer is free, reliable PDF viewer for Windows, Mac and Linux!

Good Writer is a must-have app for anyone who reads or annotates PDF documents or want to create or edit notes and formal documents in open standard format which can be opened and edited in any standard word processor like Pages, Microsoft Word or Open Office. It allows you to mark up documents with highlights and handwriting, insert text and stamps, sign and even insert pictures in your documents. Good Writer is the best choice for filling out PDF forms right on your iPad and iPhone.