jQQl is an implementation of the QQ client protocol written in Java. It is intended to be easy to use and get you up and running with a QQ client asap. This is a fork of LumaQQ, written in English.
LumaQQ is a powerful QQ client writen in Java. It implements most functions of QQ, and a QQ-like graphical user interface for easy use. It's also a library, it has a reusable pure Java core on which you can build your own QQ-compatible application.