ScrubIT (filters pr0n, so probably not what you want): "ScrubIT offers clean, reliable, and speedy DNS service FREE of charge. Our filtered DNS scrubs out the bad stuff and is absolutely simple to setup and use. Try it today!"
* 188.8.131.52 * 184.108.40.206
OpenDNS (you'll get ads on DNS misses): "Taking a few minutes to unbundle your DNS service from your ISP's Internet connection means a safer, faster, smarter and more reliable Internet experience for everyone in your household."
* 220.127.116.11 * 18.104.22.168
vnsc-pri.sys.gtei.net (no idea who or what this is; but their DNS sure is open):
Running out the door for an oil change today I noticed a little box wedged in the doorway, brought via our friends at UPS. Addressed to me from "Young America Corporation," my first thought was, "Hmm, I haven't ordered anything in weeks.