Debugging
Unfortunately, it is difficult to write bug-free programs. A good debugger is very helpful tracking down errors. On the Tardis cluster (public ITET computer rooms) we recommend to use the Data Display Debugger (DDD, a GUI variant for the commandline tool gdb). DDD supports a variety of programming languages: Ada, C, C++, Chill, Fortran, Java, Modula, Pascal, Perl, Python.
For a current list go to the DDD manual (man ddd).