Interesting OS X Apps
To play with over the weekend....
3DOSX - 3DOSX is a file system browser that utilizes three dimensions to view directory hierarchies. It supports a full range of file system actions, such as copying, labeling, creating new folders, and ejecting disks.
Goliath - WebDAV Client which lets you connect to Apple iDisks much quicker than via Finder.
mlDonkey - unofficial eDonkey client for Mac OS X. Works more reliably than the official client... and with a web interface.