Robust PDF reader with advanced annotating capabilities, excellent file manager, text file reader and editor, audio/video player, Safari-like viewer for MS Office and iWorks files. Syncs with Google Docs, Dropbox and more.
Mendeley is a free reference manager and academic social network. Make your own fully-searchable library in seconds, cite as you write, and read and annotate your PDFs on any device.
iBooks is an amazing way to download and read books. iBooks includes the iBooks Store, where you can download the latest bestselling books or your favorite classics
Read your Amazon Kindle books even if you don't have a Kindle. Automatically syncs your last page read between devices. Delete a book when you're done and Amazon keeps your copy online for later retrieval. Adjust text size, add bookmarks, and more.
Save, read, and manage the things you find online. Instapaper syncs the articles and videos you save so that they’re waiting for you on all your devices. You can read anything you save, even offline. Highlight and comment on text in any article so you can store it, retrieve it, quote it and share it.