Free sized 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.

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.

Requirements:
MacOS 8.0 or later.

Show Message Sizes is an Entourage script that works on a set of selected messages and can either show the total size in a display dialog, or a list showing each message size and the total.

Completly freeware for personal use.

Scale and print PDF files on multiple pages to create banners and posters...
Tiler will open and print PDF images on multiple sheets of paper. Add or subtract rows and columns using the toolbar icons. The image size will be automatically adjusted. The paper orientation can also be toggled using the toolbar. The image can be automatically sized to either the paper dimensions, or the printable area. Again, use the appropriate toolbar icon to choose.
Enhancements:
- adds native support for Intel-based OS X machines.

Reversi Unlimited is a remake after the classic board game Reversi.
It consists of a playfield, sized 8x8 squares, and black and white tiles. The winner is the player who has more tiles on the board when the game finishes. Initially, there are 2 black and 2 white tiles in the middle of the board, in formation of a square.
Each turn, players convert enemy tiles to their own by "surrounding" them. When a tile is placed, all enemy tiles in horizontal, vertical, and diagonal lines which end up into your own color are turned around to your color.
If there is not your tile in the end of a line, that line wont be turned. A tile can only be placed in empty square, and must convert at least 1 enemy tile to be a valid move. If there are no valid moves, you have to skip your turn. When the board fills up of tiles, the winner is the one who has more of his/her color on the board.
Enhancements:
- Fixed popup menus in options dialog under Mac OS X 10.3
- Improved saving of preferences