Apocalypse

When you are trying to gold a game, crunching time for months and you find tons of leaks, bad designs, loosy code, you look back trying to figure out how you got here.

But that's futile, you have to deliver, and then these tools are really useful:

http://www.drmemory.org/
http://cppcheck.sourceforge.net/

Thanks to DrMemory and Cpp Check teams, I owe you one.