Choosing a Help Authoring Tool
http://www.indoition.com/online-help-authoring-tool-choosing.htm

Achtelig, Marc
indoition engineering

Abstract:

Help authoring tools (HATs) are specialized editors and converters to create online technical documentation. Today, many help authoring tools also provide features for single source publishing, which means that you can generate several output formats and versions from one shared text source. While most tools manage to produce different online formats like browser-based help and compiled help very well, only few tools can also produce printed user manuals (or PDF) of professional quality. Big differences also exist between the tools when it comes to translating your projects into foreign languages.