Allows debug programs written in C, C++, and other languages, by executing them in a controlled fashion, and printing their data, on a wide variety of UNIX and non-UNIX systems.

Developer of Totalview, a tool which aids in the development of multithreaded, multiprocess and network-distributed applications.

A graphical X Window front-end for command-line debuggers such as GDB, DBX, WDB, Ladebug, JDB, XDB, the Perl debugger, or the Python debugger.

Downloads and related resources for debugging tools for Windows.

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]

An HP-supported implementation of the GNU GDB debugger.

Written in Ada as a front end to GDB and other debug programs.

Offers debuggers for ASP, JavaScript, and VBS. Information available on features and system requirements as well as an online demo. [Commercial]

An auto-tracing tool to spy Window API and COM Interface calls.

Sankhya Simulator, a retargetable Instruction Set Simulator that loads ELF/DWARF and S-Record Files; Sankhya Debugger, a simple assembly level system debugger.