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Debugging is usually done with gdb. You can either use gdb directly on the command line, or use one of the many front-ends to it. For example, kdevelop has gdb integration so you use it via the IDE. There are also projects like ddd - the data display debugger (which is awesome if your program has lots of complex data structures).
Profiler: The standard tool is gprof. You specify an option at build time and the app will be instrumented for profiling, generating log files as it runs. After it has run, you analyse this log using gprof.
You might also want to look at valgrind, which is a memory debugger and profiler.
There are also a number of smaller single purpose tools.
Because Linux is at its very heart open source, you are not going to find much commercial software of any sort for it. Nine times out of ten the commercial software one does find is actually inferior to the open source versions available.