The Data Display Debugger (DDD) is a popular graphical user interface for UNIX debuggers such as GDB, DBX and XDB. Besides ``usual'' front-end features such as viewing source texts, DDD got famous for its interactive graphical data display, where data structures are displayed as graphs. A simple mouse click dereferences pointers or views structure contents, updated each time the program stops. Using DDD, you can reason about your application by watching its data, not just by viewing it execute lines of source code.
Other DDD features include: debugging of programs written in Ada, C, C++, Chill, Fortran, Java, Modula,
and Pascal; machine-level debugging; hypertext source navigation and lookup; breakpoint, backtrace, and
history editors; preferences and settings editors; program execution in terminal emulator window;
debugging on remote host; ...
LessTif is needed.