@norz yes. One may aoso mention Filelight/Baobab.
We have already created a <i>slightly</i> similar app, DaisyDisk. Not freeware, but has its own strenghts :)

Nice app, I bought it. But the map representation of Disk Inventory X is beter.

I love baseline. It is fast and very useful.
As it seems the developer is listening to this thread: What about archiving items to a custom location (e.g. move item to archive -> burn it to disk). This would be a killer option.

@ tbrizitsky:
You're talking about Steffen Gerlach's scanner?

Looks interesting, but definitely lacks graphical representation mode. Scanner for Windows is a great tool to compare.

Baseline is not freeware!
The introductory price is $10 until the end of November. Probably more after that date.

Hi Norz,

glad you found Baseline useful. We'll definitely look at adding your request in a future version (I am the developer of Baseline).

cheers,
m.

Very useful tool! :)

There are no preferences to set in this version. One that would be useful is to always use the same unit, eg: GB, instead of mixing KB, MB and GB.

There's a good equivalent on windows: spaceobserver.