libchm-bin 2:0.40a-2 (amd64 binary) in ubuntu quantal

 It is a very simple library, but sufficient for dealing with all of the chm
 files. Library currently does not has write support.
 .
 CHM files are used on the Microsoft Windows platform to store program
 documentation, almost always in the form of HTML, with some non-standard
 quirks. CHM files are a form of archive known as InfoTech Storage Format
 (ITSF) files and contain some special files to implement features of the
 CHM viewer.
 .
 This package includes test programs.