Free varied sizes software for mac

Long ago I saw such a tool for Windows users and I thought I could need this myself on my Mac. In case Im missing some GB of disc space I could look which folder growed too much.
So this application was created and it does just this job. You select a folder, wait some minutes and you can browse it to look how big all the folders are.
This application is freeware and provided as is.
Enhancements:
- A lot of faster by using the plugins directory size class instead of RBs functions.

Acid Daze Two is written to be an interesting grunge-esque font which is best viewed at larger sizes and is a great titling typeface. It borders on illegibility and thrives on chaos.

Calculate Size 1.3 is a program computing the total size of the selected files and folders. It can calculate the total size of selected folders and files. It can include invisible files (such as folder's custom icon) for the calculation. You can get more precise size than Finder's "Get Info" dialog. It can display the progress information while calculating. You can cancel the operation any time during the calculation. By setting the progress information display mode to OFF, it can performe high speed calculation. Expand mode shows you the data fork and resource fork size of the total size.

MediaSizer is a small utility that computes the actual size of any number of files or folders on any media. It is very useful for creating CD-ROMs and other write-once disks that have large allocation block sizes.

The allocation block size is the minimum space taken up by any file that is written to a disk; the larger the disk, the larger the allocation block size.

With MediaSizer you can calculate the actual size of files on a different disk.

Requirements:
MacOS 8.0 or later.

Doc Size Manager is a MultiAd Creator AppleScript that lets you save and load your document sizes, and when loading you can choose to keep or replace the existing document sizes.

Completly freeware.