Valgrind

Valgrind is a memory analysis tool.

Main page: http://valgrind.org/

Users manual: http://valgrind.org/docs/manual/manual.html

Quick start: http://valgrind.org/docs/manual/quick-start.html

There are many tools built into Valgrind. I have used it for detecting leaks when building a component in a large C++ framework for scientific computing.