From Create help files:WinCHM is a very easy-to-use help authoring tool. Not needing to learn too much, you can be master of creating HTML help(CHM), Web help, PDF and Word documents.WinCHM 4.47
is licensed as Shareware
for the Windows operating system / platform and can be used as a free trial until the trial period ends. WinCHM is available to all software users as a free download (Shareware) with potential restrictions and is not necessarily the download of the full version.
WinCHM Virus and Malware Tests:
For security reasons, you should also check out the WinCHM virus and malware test
that has been uploaded; additional WinCHM screenshots may be available, too.