GNU DDD - (Data Display Debugger) is a graphical front-end for command-line debuggers such as GDB, DBX, WDB, Ladebug, JDB, XDB, the Perl debugger, the bash debugger bashdb, the GNU Make debugger remake, or the Python debugger pydb. Besides "usual" front-end features such as viewing source texts, DDD has become famous through its interactive graphical data display, where data structures are displayed as graphs.
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As of September 2025, the mindshare of GNU DDD in the Debugging category
stands at 12.1%, up from 9.7% compared to the previous year, according to calculations based on PeerSpot user engagement data.
