GKrellDnet is Distributed.net client monitor plugin for GKrellM. It includes a Distributed.net client wrapper, so you can write monitoring apps for WindowMaker, GNOME, Enlightenment, etc.
Gkremldk is a GKrellM plugin showing current
mldonkey download and upload rates. You can also
set on-the-fly the maximum rates by clicking on
Linux Control and Measurement Device Interface
A framework for writing command line applications in Java.