VNC viewer on Snow Leopard

If you need to connect to a VNC server with your Mac, you do not need to download and install a VNC client. Snow Leopard has and application in '/System/Library/CoreServices/Screen Sharing'. Just click 'Screen Sharing' and you will be prompted to enter an IP or host name of the server. It works much better than Chicken of the VNC. Screen Sharing is also compatible with Apple Remote Desktop (ARD) v2.1 or later.

Mac OS X 10.5 has this application too (Snow Leopard is 10.6).

Links:

Mac OS X 10.6 Help - About screen sharing