UBook
µBook is a simple and lean, yet powerful ebook reader for Windows and Pocket PCs that can read HTML, TXT, RTF, CHM, PDB (PalmDOC) and PRC (MOBI files, not DRM) ebook files.
It can read directly from inside ZIP files, and supports BMP, GIF, PNG and JPG images. It offers many customization options including: Portrait and Landscape display, Choice of font type, color and size, etc.... It Also has a resizable/skinnable User Interface.
There is also a µBookLite version. µBookLite for Palm OS (3.5+), Pocket PC / Mobile PC (Windows CE 3.0+) (soon for Smartphone) is a simple and lean, yet powerful ebook reader that can read PDB and PRC (not secure) ebook (in HTML, TXT or PML format).
It supports embedded BMP, GIF, PNG and JPG images and offers many customization options including: Hyphenating, Auto-Scrolling, Choice of fonts and sizes, etc....
For the Palm the font packs are downloadable separately.
For more details see http://www.gowerpoint.com/