FBReader

FBReader is a free ebook reader. Main ebook formats: ePub (including main features of ePub3), Kindle azw3 (a. K. A. Mob), fb2(. Zip). Other supported formats: RTF, doc (MS Word), HTML, plain text. PDF, DjVu, and comics supported via free plugins. FBReader can synchronize your library, bookmarks, and reading positions via the Book Network, a Google Drive based cloud service.