This release of RDoc brings some big changes. Most notably Michael  
GrangerÃÔ Darkfish generator has become the default output format for  Doc! Michael put a ton of great work into this, and it looks quite  
lovely. Check out the RDoc documentation for a sample:

http://rdoc.rubyforge.org/

rdoc_chm and rdoc_html_templates have been split off from RDoc and  
released separately as unmaintained software. I donÃÕ plan to make any  
future changes or updates to rdoc_html_templates (which are for the  
old HTML generator) ever, but somebody may be interested in taking  
over maintainership of the rdoc_chm generator.

rdoc will automatically detect rdoc_html_templates and rdoc_chm, so  
you only need to install them to make them usable via command-line