KchmViewer is a chm (MS HTML help file format) viewer, written in C++. Unlike most existing CHM viewers for Unix, it uses Trolltech Qt widget library, and does not depend on KDE or Gnome. However, it may be compiled with full KDE support, including KDE widgets and KIO/KHTML.
The main advantage of KchmViewer is non-English language support. Unlike others, KchmViewer in most cases correctly detects help file encoding, correctly shows tables of context of Russian, Korean, Chinese and Japanese help files, and correctly searches in non-English help files (search for MBCS languages - ja/ko/ch is still in progress).
KchmViewer is written by George Yunaev, and is licensed under GNU GPL v3 license.