I started a quirky little side project where I'm writing short piano pieces mostly intended for sight reading usage.
New pieces are posted a couple times a week on my website, each with a varying level of difficulty. They're completely free to download for anyone interested. Just go to http://www.FugueAndFury.com and click on the latest entry.
Obviously because of differing levels of skill, some pieces will be easier for some pianists than others, but the goal is to provide a variety to help "mix it up" in the sight reading department.
Hopefully at least a few of you will find it useful.