DonnaYoung.org has lots of handwriting paper, some ruled in colored stripes or with blank tops & ruled bottoms for illustrated writing. This former homeschooler even has ruled & unruled paper with themes, in addition to journal, booklet, and bordered paper, like the one below.
graphpaper.us allows you to print simple graph paper with your choice of size and colored grid lines. Cool for your school colors - this one is purple in honor of Dibrell Elementary School!
MathBits has blank calculator screens and number lines as well as a wide variety of graph paper.
Print Free Graph Paper lets you choose graph type, paper size, units, etc., before you print.
There's really something for everyone, and I hope you and your real students enjoy the possibilities!