Hi,
We can implement the open source Darwin Information Type Architecture open toolkit (DITA OTK). See http://en.wikipedia.org/wiki/Darwin_...g_Architecture for more information.
This is a JAVA-based, ANT script based tool. It has a standard set of DTDs where you can write all the content (task/concept/reference) in XML format and assemble them into a ditamap/bookmap and create multiple output formats like PDF, HTML help, CHM, JAVA help, and eclipse help. Let me know if we need to get this started.
Thanks,
Ravi