This ripl plugin automatically starts the debugger whenever an evaled input throws an exception. The debugger is started at the source of the exception.

A modular, testable, Ruby debugger using some of good 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 on Rubinus 1.2.1 or higher.

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.

Nikita App is a developer tool that runs on Rubinius.

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

rbdbg is a console debugger for Windows/OSX/Linux, primarily designed for automation.

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

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 versi...

A pure-ruby debugger. No more puts "HERE!!!" or p :var => var, :other => other until you find what caused the bug. Just add a breakpoint and see the value of any variable.

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

Rhomobile debugger extension

The Multimodal Interaction Framwork debugger enables model inspection at system runtime.

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.

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

Unit testing library with colourful, helpful error messages, small testing code footprint, good debugger integration. (Derivative work of Dfect/Detest.)

Adds an initializer that loads and starts the debugger, and a 'rake debug' task that tells Phusion Passenger to restart with debugging enabled. This makes it possible to do interactive debugging when using the Phusion Passenger Apache module - it does not require the standalone se...

debugger 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.

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.

Provide Ruby core source files for C extensions that need them.

a regexp debugger GUI