Maybe not as pretty, but does the same thing... (Score 5, Informative)

CCMalloc also detects memory leaks and shows you where they took place. Even uses the GPL! It might not be as easy to use (you link your program to it during compile instead of running the it on a completed binary), and doesnt have a web interface, but its functional, and has been out for years.

I bet someone could write a ld_preload kind of thing that calls ccmalloc, and you could run it on the completed binary as well, so you could run 'ccmalloc ./a.out' just like the 'gsinject -d ./a.out' of this product.

Here is ccmalloc's page.
http://www.inf.ethz.ch/personal/biere/proje cts/ccm alloc/