PySizer is a memory usage profiler for Python code.
Warning: I haven't had much time to work on PySizer recently. Another (better-maintained) project with the same aim is Heapy.
You can get version 0.1.1 in tar.gz or zip format.
There's a win32 build for Python 2.4 here.
0.1.1 has bugfixes to 0.1 - in particular, a nasty bug which meant that copy and filterd were more or less broken. Also, it should work under Python 2.3 (but it hasn't been tested much) and under Windows, though I quietly put those two into 0.1 anyway.
The source is kept using Subversion at http://codespeak.net/svn/user/nick8325/sizer, and you can browse the source here too. The SVN head is broken at the moment, though.
There's a tutorial here.
There's some automatically-generated documentation here.
Both of these come with the release.
You can find some information about the internals of the profiler here.
You can contact me at email@example.com.