The Napkin Look and Feel is a pluggable Java look and feel that looks like it was scrawled on a napkin. You can use it to make provisional work actually look provisonal, or just for fun.
Project Looking Glass X11 Build Repository
A Java-based Echolink Client for Amateur Radio
Personal diary manager and scheduling tool.
A JAIN-SIP based voice and text instant messaging client
SIP Signaling stack for J2ME
An API for communicating via Yahoo's YMSG Instant Messenger/Chatroom protocols, plus related support classes for chatroom spam blocking, styled text decoding and Swing model updates.
JAIN-SIP Service Platform
API for networked app w/ MIDP2. Try Seadragon 2 w/ Leafy.
Simple powerful transparent distributed computing; home of the World Wide Virtual Machine (wwvm)
Instant Messaging Client and Library supporting AIM and ICQ
This is a framework that allows for the quick development of JTAPI, JAIN Call Control and JAIN Jcat implementations through the use of a simplified service provider interface.
One-to-One Encrypted Chat Application
jain-sip placeholder (see https://java.net/projects/jsip )
Java for Communications - wireless, wireline, and IP networks