With Giver, you can share files between desktops on your network with absolutely no configuration necessary. Other Giver clients are automatically discovered using Avahi.
Giver is a simple file sharing desktop application. Other people running Giver on your network are automatically discovered and you can send files to them by simply dragging the files to their photo or icon shown in Giver. There is no knowledge or set up needed beyond what the person looks like or their name to use Giver.