Send short message to another Mac on the LAN I am looking for an OS X application that will allow me to send a short message (URL, etc.) to another Mac running on the same LAN or WiFi.

I have two Macs at work, my company iMac and personal MacBook Pro, sitting side-by-side. Sometimes I read something on one and want to send the URL to the other. I have Instapaper, but that is overkill for this simple task.

Any ideas?
Messages app on Lion or Mountain Lion supports Bonjour discovery which lets computers discover other devices using Messages app on your local network without needing a central server setup.

Bonjour is not on by default, but you can find the option under Preferences, or simply ⌘+, to open up the panel. Select the account page, and you will find Bonjour in the sidebar.

Turn it on and you're good to go.

Now to retrieve the list of people on your local network, simply ⌘+1 to bring up the buddy list, it is also available under the Windows menu item.