If you use GDB you definitely have to try Dashboard package by Andrea Cardaci.

Here is how it looks like:

Looks very nice, it updates itself each time when you step or do another action. It was confusing why Memory area is empty by default and shows nothing even when I try to x <memory>.

It turned out I have to tell dashboard to watch for particular area of memory. Here is how to do it:

dashboard memory watch <addr> <how many bytes>

for example:

dashboard memory watch $ebp 42

Now it looks awesome.