Question: Software for documentation?

[voronwe]

Hi

Because I need to do a documentation for a Software, I'd like to ask to Mario:

What tools are you using to generate the help-file for IMatch?

And, because the documentation I have to write should be platform independent (should be usable in Linux too): Does this tool also generates the documentation as html?

[Mario]

The source of the help file is HTML and CSS, which is then compiled using Microsoft's help compiler to produce the CHM file.
For platform independence I would always go HTML and CSS.
Get a good HTML editor with spell checking (Brackets or the WebStorm or Notepad++) and then let fly.