Just some random stuff that I tend to use across projects. I've moved away from python recently, so this doesn't get as much use as it used to, but I still use it occasionally.
The evilplot code is written by Andrew McNabb. It's a pretty handy library for creating Gnuplot input files from python. I didn't see it available anywhere else, so, Andrew, if you see this and don't like me including it here, let me know.
The dateutil code is from the python-dateutil package, available under a BSD license.