Web Help Creation Without Any Commercial Tools

Is there a way I can create a web help system without using commercial tools such as HelpSmith?

I have been able to create CHM files using basic html files and images, and so far so good. However when it comes to creating html help, I can't seem to find any way of doing it without using some or the other commercial tools. Surely there must be a way of doing it with just html files?

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AFAIK Microsoft HTML Help Workshop can be used for that purpose, read more here http://msdn.microsoft.com/en-us/libr...(v=vs.85).aspx