Perhaps, rcov:  http://eigenclass.org/hiki.rb?rcov
Though, you'll need really good test suite to see info for usage of
*all* methods :)

2007/3/30, Larry Fast <lfast / mdsi.ca>:
> I'm looking for something that will create a cross-reference document
> showing where all my methods are being used. An ideal world would
> include forward and reverse links within an editor.  Are there any
> editors, environments or tools that provide this functionality for Ruby?
>
> Thanks,
> Larry Fast
>
> --
> Posted via http://www.ruby-forum.com/.
>
>