Memprof: A Ruby level memory profiler (opens in new tab)

This guy has reinstated my love of hacking binaries, we used to do this alot when we were rewriting memory of MMORPGs like Asheron's Call. Never thought about doing it for legitimate reasons.

Wonderful example on how to turn an hack (poking inside the memory to insert a trampoline) into a working useful product.

EDIT: btw it should be possible to do the trick even in 90% of stripped binaries. Just calculate the right offsets offline and if the bin is stripped try this binary against a table (consisting of offsets -> first N bytes of "famous" binaries). So at least it's possible to add support for "notable" stripped binaries like mac os x default ruby install, debian, ubuntu, and so forth.