Help Authoring Tool Survey
http://www.indoition.com/online-help-authoring-tools-survey.htm

Achtelig, Marc
indoition engineering

Abstract:

Market overview of recommendable tools for creating software documentation, especially for the creation of user manuals and online help files. Many of these help authoring tools can generate printable user manuals (PDF) and onlne help files from the same text base (single source publishing principle).