I uploaded it here a looooong time ago in the old programs section. It's back!
Simplechat is a simple little IM client that runs off IPs. To host a chat, choose host and pick a nickname. To join one, choose join, type in a nick and the ip. Tricky or what? :P If you need to know what ports to forward, lemme know and I'll dig out the source code and let you know what ones.
Download links - Sharebee.com, the one and only online file hosting distribution service. (Size - 2.54 meg)
Virustotal scan - VirusTotal - Free Online Virus and Malware Scan - Result