Help Explorer Viewer — is a free cross-platform viewer for compiled help files.
Help Explorer Viewer provides a rock-solid solution for displaying help files in the WinHelp (.HLP), HTML Help 1.x (.CHM) and Microsoft Help 2.0 (.HXS) formats on Linux and Windows platforms. Since the latest version of Windows - Windows Vista - has optional and limited support for WinHelp files, Help Explorer Viewer comes in handy.
In addition to the standalone version, the Help Explorer Viewer engine can be easily integrated into any application and distributed as part of a custom solution under the terms of the redistributable license agreement.