Sankhya Simulator, a retargetable Instruction Set Simulator that loads ELF/DWARF and S-Record Files; Sankhya Debugger, a simple assembly level system debugger.
A logging tool for debugging and monitoring .NET, Java and Delphi applications. Includes various logging libraries and a graphical viewer application. Site includes screenshots, tour, articles, and details of features. [Commercial, with free trial]
Stand-alone debugger for C/C++ applications, running on MS-Windows platforms, supporting Borland C++ and Visual C++. Site includes feature overview, documentation, screenshots, download option, source code access. [MIT License]
The standard debugger for the GNU software system. Runs on many Unix-like systems, supports Ada, C, C++, FreeBASIC, Free Pascal and Fortran. Site includes release schedule, documentation, download option, news, bug reports and mailing lists.
Visual Studio add-in for debugging embedded targets, local Cygwin/MinGW applications or Unix programs on remote machines using GDB as a backend and SSH protocol for communication. Most Visual Studio debugger features are supported. Site includes a feature overview, screenshots, trial download option, and purchasing information.
One page web-site that offers a very basic mechanism to enter regular expressions and to test if provided input matches these. Result output is in the form of some sort of parse tree.
Graphical user interface to the GNU Debugger (GDB) that is written in Tcl/Tk. Site includes screenshots, download option, bug database, and FAQ section. [GPL v2, v3]
Tool for debugging of embedded Linux applications. Site includes documentation, platform coverage, download option, and tips and tricks section. [GPL v3]
Forward and backward (in time) debugger for embedded C/C++ by Green Hills Software. Site includes some documentation, screenshot, and datasheet. [Commercial]
Cross-platform GDB frontend with graphical user interface for C++, C and QScript. Site includes download option, open issues overview, source code access and blogs. [Lesser GPL]