I have Freda+ and Bookviser on my HTC Titan. I am mainly using Freda.
Bookviser supports EPUB, FB2 and TXT formats.
•Reads ePub (DRM-free), HTML and TXT format books
•Customisable controls, fonts and colours
•Bookmarks and annotations
•Integrates with on-line catalogs - Feedbooks, Smashwords, Gutenberg ...
•Connects to your DropBox account for downloading book files
•Links to your Calibre book library
•Can download books from any website using an in-application browser
•Share comments, likes and dislikes using twitter, facebook or email