Cool Reader - Fast and small cross-platform eBook reader for desktops and handheld devices

NoteAway - NoteAway is the simplest, most convenient way to take quick notes on OS X.

Gitden Reader - For those book readers who want a flow while reading their favorite books via their smartphones will surely like using this application because this simple book reading app has lot of reading features offer to them.

TakeNote - A web-based note-taking app with GitHub sync and Markdown support.

FBReader - FBReader is an e-book reader for various platforms. Features:

Speechy - Speechy is an app by Twelve Stars Software that comes up with features to help you in reading text in a variety of different formats such as pdf, txt, EPUB, webpages, and many others.