Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
calibre - Ebook manager, viewer & converter
Meta Search - Search your Desktop, Google Drive, Dropbox, Gmail, Evernote.
FBReader - FBReader is an e-book reader for various platforms. Features:
Community Box - Easily create beautiful directories
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.