duby is a collective name for a debugging library (dubylib) and an(implementation of) debugger (dubyline).
It could also be reference to dubyline plugin for Lazarus IDE
(should be read as "dubby" - a little debugger)
Public Repository: http://svn.code.sf.net/p/duby/code/
- Duby/Lazarus - duby plugin for Lazarus-IDE