Chicken of the VNC is a 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.
This project has has been superseded by http://chicken.sourceforge.net/
This app is poorly maintained, not having a release in 4 years. The fork looks to be a preferable alternative. The forked project name is also on SF with the name of just "chicken"
It has nothing of what one might expect in a modern vnc client. There are other, alas not open-source, alternatives; also built-in screensharing works better, especially in a mac2mac situation