Gnutella, Seti@Home, ProcessTree, ...

...Napster, Popular Power and others. Various distributed computing initiatives.

Seti@Home has been around for some time, and allows users to contribute CPU time by running screen savers or simple daemons which utilise their unused resources for signal processing. Signals from space are thus analysed to try and isolate elements which could be communications.

ProcessTree and the now-closed Popular Power are generalisations of this mechanism, allowing programs to be written for this kind of virtual environment.

Gnutella and Napster are distributed file sharing systems.

Jtrix is a generalisation of all these ideas. Each is an application which would be very well suited to being a Jtrix application, albeit using only a small percentage of its potential.