CoolReader is a fast and small cross-platform XML / CSS based rendering library for writing E-Book readers for desktops and even for handheld devices.
CoolReader is fast and small cross-platform XML/CSS based E-Book reader for desktops and handheld devices.Download
Currentlly this application offers support for the folowing e-book formats: FB2, TXT, RTF, DOC, TCR, HTML, EPUB, CHM, PDB, MOBI.
Also worth mentioning is the fact that this tool has a GUI implementation for eInk base devices.