Dover Samples

I think most homeschoolers are familiar with Dover books. They're the ones that publish the gorgeous colouring books on Ancient Egypt or Renaissance fashions. If you check out this page on their website you'll be able to sign up for a weekly email that will link you to a page where you can download samples of clipart, puzzles and colouring pages. They also have a large collection of Halloween themed printables here.

A few examples: