MobiPocket Reader 4.3
the author of this app says:
The latest release of MobiPocket Reader is better than ever.
It has new features, including support for images, color and hypertext links. In addition to this, MobiPocket hasn't forgotten to keep the standard features.
Rich-text HTML, bookmarks, a table of contents, font size management options, a full-screen mode and full-justified text are just some of the basic features.