FLOOX - FLOOX app allows you to select a book from the internal storage to listen to it in the audio version by selecting the desired text-to-speech settings.
TakeNote - A web-based note-taking app with GitHub sync and Markdown support.
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.
NoteAway - NoteAway is the simplest, most convenient way to take quick notes on OS X.
Lithium: EPUB Reader - Lithium: EPUB Reader app allows users to read their favorite eBooks after importing it from the internal storage.
PlicPad - Shareable notepad without urls