Applejack - Freeware
AppleJack is a user friendly troubleshooting assistant for Mac OS X. With AppleJack you can troubleshoot a computer even if you can't load the GUI, or don't have a startup CD handy. AppleJack runs in Single User Mode and is menu-based for ease of use.
Requirements: OS X 10.2-1.5.8
(see compatibility notes)
Chicken of the VNC - Freeware
Chicken of the VNC is a fast, lightweight VNC client for Mac OS X. A VNC client allows one to display and interact with a remote computer screen. In other words, you can use Chicken of the VNC to interact with a remote computer as though it's right next to you.
Requirements: OS X 10.3.9 or later
GrandPerspective - Freeware
GrandPerspective is a small utility application for Mac OS X that graphically shows the disk usage within a file system. It can help you to manage your disk, as you can easily spot which files and folders take up the most space. It uses a so called tree map for visualisation. Each file is shown as a rectangle with an area proportional to the file's size. Files in the same folder appear together, but their placement is otherwise arbitrary.
Requirements: OS X 10.3 or later
JollysFastVNC - Shareware
JollysFastVNC is a secure ARD and VNC client. Its aim is to be the best and most secure VNC client on the Mac.
Requirements: Mac OS X 10.4 or later
smcFanControl - Freeware
smcFanControl lets the user set the minimum speed of the built-in fans, allowing you to increase your minimum fan speed and helping make your MacBook run cooler.
Requirements: OS X 10.4 or later; Intel Processor