NitroShare makes it easy to transfer files from one machine to another on the same network. All of the machines on your network running NitroShare should immediately find each other and you can instantly begin sharing files.
NitroShare introduces the concept of "share boxes", which are small widgets that are placed on your desktop. Each share box represents another machine on your local network that you can instantly share files with by dropping them on it. (You can also create a share box that will ask you which machine you want to send the files to.)