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):
So, after never wanting an iPhone, I was given one by my sister. It works flawlessly for two work related apps that I use daily that were not quite stable with my HTC One X+. This is the ONLY reason I switched.