Plan9 provides many interesting tools and takes on unix, including its own variety of [[c]], [[9c]]. To have access to them here on [[sans]] we use plan9port to provide plan9 tools in user space.
For a full list of the stuff you can use, see plan9port's documentation (linked below). Plan9port includes some graphical applications, too, namely sam and acme -- if you can figure out how to use 'em over ssh, go nuts!