The GoldenGate OpenR66 Client Gui project is a simple Graphical User Interface for OpenR66 Client that allows to check connection with a remote host or to initiate a synchronous transfer.
It is based mainly on the NETTY framework (NIO great framework support at http://www.jboss.org/netty and is tend to be really efficient, both in term of memory, threads and network bandwidth.
The specificity of this project is you can adapt this software to your particular needs by changing the pre or post action (even error actions) on transfers (not only transfer).
See global GoldenGate project at http://openr66.free.fr/ and particular OpenR66 project at http://openr66.free.fr/OpenR66.html