GXP is a parallel/distributed shell, plus a parallel task execution
engine that runs your Makefile in parallel on distributed machines.
Very easy to install (no need to compile. install it on YOUR machine
and use it on ALL machines).
The Distribulator: Distributed Computing For The Rest Of Us. This is an SSH-based command execution and file transfer utility that includes support for batch, console, and shell integration modes, multiple server enviornments, and full audit logs.