Underground IM, the free Java Instant Messaging solution. Both a client and a server are available. Underground IM is open source software distributed free of charge under the terms of the GNU General Public License.

Features Easy to use Created with Java Cross-platform Secure, uses AES to encrypt packets Message notification and message sounds HTML Support Font / Colour selection Emoticons Personal Messages Profiles Online Status Friend Lists File Transfer Open Source FREE

The goal of Underground IM is to provide a free, easy to use, secure Instant Messenger that is not littered with advertisements. We understand that many agencies invade your privacy by recording your conversations. However, we enable a safe form of communication where this invasion is made difficult.