In showing a long lists, sometimes one would prefer to see the value arranged aligned in columns. Some examples include listing methods of an object or debugger commands. See Examples in the rdoc documentation for examples.

Turn Pry into a primitive debugger. Adds 'step' and 'next' commands to control execution.

Rubinius debugger.

ruby-debug is a fast implementation of the standard Ruby debugger debug.rb. It is implemented by utilizing a new Ruby C API hook. The core component provides support that front-ends can build on. It provides breakpoint handling, bindings for stack frames among other things.

Interactive test debugger for Capybara tests

ruined is Ruby Source Level Debugger for educational purpose.

A set of patches to Ruby MRI 1.9.3 and 1.9.2 that adds run-time introspection, a call frame object, and other run-time support for things like debuggers. Necessary patches and some simple patch code are found in the git repository. See https://github.com/rocky/rb-threadframe/wiki/How-to-Install for how to install.

Rhomobile debugger extension

Add a JRuby-compatible debugger to 'pry'. Adds 'step', 'next', 'continue', `break` and `breakpoints` commands to control execution.

Quick Ruby debugger. Easily print any object or string to the console and to your logs while you're working.

Better rails debugger can analyze memory issues only by the moment, but performance is planned.

The Ruby Regex Debugger. Put your regex in the top pane, and your match text in the bottom pane. Kang will highlight the match text that matches and show you any match groups you have created down the right hand side.

An extremely early build for a Ruby Debugging tool, designed to be able to hook into various classes and track changes. Not intended to be used by others at this stage.

Metasm is a cross-architecture assembler, disassembler, linker, and debugger.

A modular, testable, Ruby debugger using some of the best ideas from ruby-debug, other debuggers, and Ruby Rails. Some of the core debugger concepts have been rethought. As a result, some of this may be experimental. This version works only with MRI 1.8 and 1.9' See rbx-trepanning for a version that works with Rubinius, and trepanning and for something that works with a patched YARV 1.9.2.

Linecache is a module for reading and caching lines. This may be useful for example in a debugger where the same lines are shown many times.

Uses Pry (http://rdoc.info/github/banister/pry/master/file/README.markdown) as a debugger and introspection tool.

This is a stupid simple example of how easy it is to make a minitest plugin that does something useful. In this case it wraps assert so that failed assertions will drop into the ruby debugger.

Combine 'pry' with 'debugger'. Adds 'step', 'next', and 'continue' commands to control execution.

Provides Origen tester models to drive bench debuggers such as the Segger J-Link.