These are packages that I use and recommend on my Linux Ubuntu box.
System Tools
Filelight
Displays a circular graph of the space used by your files, so you know when you
have big files (for example, images of your work) that if you backup them you’ll save space. sudo apt-get install filelight
gdmap
Displays space used by files, but with squares. sudo apt-get install gdmap
gParted
Interface for partitioning your hard disk drive, and make it a bit easier, without having to reinstall everything. sudo apt-get install gparted
aptoncd
Just for Ubuntu and Debian. Allows to backup your packages installed in a CD so you can have them ready to
install in another computer. sudo apt-get install aptoncd
If you find yourself using your iPhone and iPod Touch to browse the web more and more each day then be sure to setup your iPhone/iPod Touch to sync your Safari Bookmarks.
Open iTunes and connect your iPhone/iPod Touch
Select the iPhone/iPod Touch in iTunes
Select the info Tab
Scroll Down to Web Browser and check the box next to Sync Safari Bookmarks
Click Sync and check your iPhone/iPod Touch for the updated Bookmark list
Discover interesting sites while on the go and able to check back on them when you return to the larger screen comfort of your Mac. Taking your bookmarks with you has never been easier.