Open Source Debuggers

wxHexEditor is another Hex Editor, build because of there is no good hex editor for Linux system, specially for big files. It supports files up to 2^64 bytes. Written with C++/wxWidgets GUI libs and can be used with other OS'es such Windows, Mac OS

Jar Browser is a Java development utility for searching and browsing the contents of a set of jar and zip files. It supports searching for classes across multiple jars, plus a variety of other features. Great for solving CLASSPATH issues.

An official experimental fork of Python's integrated development environment IDLE. Worthwhile and successful changes and additions will go back into the Python distribution's IDLE at some later stage. There is no spanish inquisition.

We extend the Eclipse IDE with tools for development in Haskell, a functional programming language, providing support for a wide range of tools (compilers, interpreters, doc tools etc.) in a coherent, convenient and configurable environment.

Free cross-platform debugger for C/C++. It is frontend for GNU Project Debugger (GDB). Has good looking interface based on Qt4. See http://beaverdbg.googlecode.com for more info.

A COBOL debugger for GnuCOBOL written in GnuCOBOL. Works with both current GnuCOBOL and old GnuCOBOL/OpenCOBOL 1.1; could be used for other vendors with slightly modifications, too. Take a look at https://gnucobol.altervista.org/tp-cobol-debugger/

AVRsimu is a simulator for Atmel AVR microcontrollers. It has a command line interface, graphical interfaces may follow. AVRsimu aims to be small and portable.

CTrace is a multi-threaded trace debug library written in C. It provides a simple, fast, well documented trace utility for applications and as such is especially suitable for use in real-time embedded applications.

This project aims to implement an LC2/LC3 assembler and simulator for the Linux and Windows platforms.

Introspect on running programme, view and alter object fields and methods. Edit the code of any method at runtime; apply the changes to any combination of objects, such as an array, or a complete class. Complete rewrite underway available Jan 2007.

SDCC source-level debugger, monitor and downloader for the 8051 based TI MSC12xxEVM's. Windows, Cygwin, Linux and BSD Macs have all been tested under SDCC 2.5.0 is supported. SDCC 2.6.0 is not yet supported.

the omega xvi project is a javascript debugger written in javascript. it can debug code, execute blocks of code or entire applications, as well as detect variables. because of its javascript nature, it can be run through a webpage, online.

An implementation of Kent Beck's famous XUnit testing framework designed specifically for unit testing components written for the .NET platform.

ALF, The Automated Logging Framework, is a native logging framework for Java with the unique advantage of supporting automated method tracing. This platform-independent library allows developers to debug their applications quickly without adding code

ATmon is a bootloader and monitor tool for the Atmel ATmega32 microcontroller.

ANSIMD (Ansi Memory Debugger) is a compact, powerful and flexible debugging facility, completely configurable at runtime, that detects automatically a large class of problems related to memory management. It is portable and requires low resources.

This is a simple, modular PHP class designed to record execution time benchmarks throughout different parts of a script. Compatible with virtually any PHP script, the code can be added/removed quickly and with ease. Accurate to the microsecond.

Z80 ASM editor that gives you real-time info about Mnemonics, Waitstates/Clock cycles, and Labels. Features code completion, real-time debugging and T-states profiling.

Java Class and Byte Code verifier. Verifies static class file structure, external references, analyzes operand stack and local variables through byte code execution emulation. Includes CLDC standard verfication.

Java natural log includes class to do the following. Automatically produce method and class names, and line numbers in log messages. Send messages to syslogd servers via three different mechanisms. Simplify messages to just the message itself.

ClasspathHelper provides eclipse plugins that determine classpath/classloading related dependencies such as unresolved references, blocked/obscured clases as well as unreferenced classes/jars. ClasspathHelper can model most classloading scenarios.

Code Bubbles is a front end to Eclipse designed to simplify programming by making it easy for the programmer to define and use working sets. It provides compact function-based views of the code (all backed by the underlying files) that are displayed in bubbles and that are easily moved around and manipulated on the screen. The bubbles are fully editable. A large bubble area lets the programmer set up different working sets simultaneously and easily move between them.

Concutest is a collection of tools designed to make the development and testing of concurrent Java programs easier and more reliable. Concutest is available under the BSD License and under active development by the JavaPLT group at Rice University.

When testing using a database with rollback after each test, failing tests are very hard to resolve. Data Storm is a simple DB viewer directly launchable from within your test code to enable you to inspect the current state of the database.

Debugging library for .NET (written in C#). Log as plain text, xml and treeviews into console, debug window, files and eventlog. Covers pretty much all debugging needs.