debuggers

Very good front-end for gdb. Can be controlled with mouse and with standard gdb commands.

CGDB is a curses-based interface to the GNU Debugger (GDB). The goal of CGDB is to be lightweight and responsive; not encumbered with unnecessary features.

Code Medic is compatible with all versions of gdb and provides an elegant, graphical interface to its most important features. gdb currently supports C/C++, Java, PalmOS, various embedded systems, Assembly, FORTRAN, and Modula-2.

HT is a file editor/viewer/analyzer for executables.

UPS is a source level C and C++ debugger that runs under X11. Fortran is also supported on some systems. It's a very light debugger, but is quite efficient and works well.

Search/replace/dump memory from running processes and core files.

Fenris is a multipurpose tracer, debugger, and code analysis tool that detects and documents high-level language constructions, can recover symbols, graph program execution flow, detect internal functions, recover symbol tables, and deal with anti-debuggi

Gubed is a PHP Debugger.

dbvi is a UNIX terminal-based interface to the gdb debugger. It tightly integrates a vi session with the usual gdb command line.

FindBugs looks for bugs in Java programs. It can detect a variety of common coding mistakes.

JSwat is a graphical, stand-alone Java debugger, using the JPDA library.

StDB is a debugger for the Joost Streaming Transformations for XML (STX) processor, which implements a one-pass transformation language for XML documents that builds on the Simple API for XML (SAX).