I do landscaping and woodworking projects at home. Many times I want to step away from the computer and sketch out my designs before I start. I threw together a basic graph papper generator so I can use the whole page for my project, no rulers required.
It also has a setting for creating non-square grids (at the request of my mom for knitting projects :)).
Currently it supports two basic graphs:
jgraphpaper is licensed under the GPL and you can download the source for the latest release here:
However the easiest way to run the application is to load the applet.