ruby-debug – A Ruby Debugger ruby-debug is a debugger for Ruby 1.8 written by Kent Sibilev. It is faster that the debugger that ships with Ruby. Some of this debugger is used by most of the IDEs such as by many IDE's (from Eclipse, Aptana, ActiveState or from JRuby). Mark Moseley ported of this to Ruby 1.9. Rocky Bernstein is working on a rewrite for Ruby 1.9, but that currently requires a patched