GeGeMeiMei

This is an instant messenger based on TCP socket connection between Server and Client, which features:

Chatting with both text messages and emoticons
User-defined avatar icons
Searching for friends by either username or by particulars
Offline message preservation on Server side (implemented by JDBC/MYSQL).
Chatting history available for check (implemented by SQlite)

It is still under development, so I apologize if you find it unstable.