This (Warning: EXE file, do not click unless you want to download this file!) has got to be one of the best things on the internet. It's a graph paper generating program, that will make you rectangular, polar, polygonal, and many other types of graph paper, to your exact specifications, that can be copy/pasted straight into a Word document. Also it does handwriting paper with adjustable rule width (YES now I can have REAL thin-rule notebook paper!) AND will print out music paper for you.
How. Utterly. Cool.
And, I am such a geek for loving it. But, I was in serious need of a graph paper image for the Laboratory Manual I'm writing, and this is just perfect. Really.
Tennis and graph paper fill me with love.