
FBReader (3.6 MB), a highly customisable ebook reader with non-nonsense menus delivers an excellent way to read an ebook. The app supports epub, rtf, fb2 (.zip), mobi, and plain text file formats, text-to-speak and other plugins, and integrates with external dictionaries.

Moon+ Reader (5.7 MB), read books in various formats such as ePub, txt, html, chm, fb2, umd or zip, with user settings for visuals, controls and themes. You can also bookmark, highlight, add notes and lookup words, and get free ebooks from online libraries.

Cool Reader (6.5 MB) supports a multitude of ebook formats including epub (non-DRM), fb2, doc, txt, rtf, html, chm, tcr, pdb, prc, mobi (non-DRM), and pml, with loads of settings such as bookmarks, text to speech, fonts, etc., that make reading a book more interesting.