VNCThing is a Mac client for the VNC protocol. It allows you to remotely control computers which run a VNC server.
Unfortunately, VNCThing is not available anymore, except using web.archive.org. Version 2.2 has a security problem (related to the use of zlib for compression). VNCThing 2.3 fixes this, but 2.3 is not available. If someone wants to pick up: the source code is available from web.archive.org as well.