Hadn't seen this link for a memory-debugger pop up in the forums so I figured i'd pass it along.
Haven't had a reason to actually use it yet, but it certainly looks impressive.
Looks very impressive...
There is DDD debugger which is frontend for GDB and others: https://www.gnu.org/software/ddd/
Its focus is representing data structures visually in various ways. For example, here's how linked lists look like in DDD: http://www.cs.angelo.edu/~mmotl/2...dd/html/PICS/ddd-print-output.png