This post is partly introspection, and partly advertising. Skip if it either annoys you.
Back in February I was thinking about what to do with myself. I had two main options "Get a job", and "Start a service". Because I didn't have any ideas that seemed terribly interesting I asked people what they would pay for.
There were several replies, largely based "infrastructure hosting" (which was pretty much 50/50 split between "DNS hosting", and project hosting with something like trac, redmine, or similar).
At the time DNS seemed hard, and later I discovered there were already at least two well-regarded people doing DNS things, with revision control.
So I shelved the idea, after reaching out to both companies to no avail. (This later lead to drama, but we'll pretend it didn't.) Ultimately I sought and acquired gainful employment.
Then, during the course of my gainful employment I was exposed to Amazons Route53 service. It looked like I was going to be doing many things with this, so I wanted to understand it more thoroughly than I did. That lead to the creation of a Dynamic-DNS service - which seemed to be about the simplest thing you could do with the ability to programatically add/edit/delete DNS records via an API.
As this was a random hack put together over the course of a couple of nights I didn't really expect it to be any more popular than anything else I'd deployed, and with the sudden influx of users I wanted to see if I could charge people. Ultimately many people pretended they'd pay, but nobody actually committed. So on that basis I released the source code and decided to ignore the two main missing features - lack of MX records, and lack of sub-sub-domains. (Isn't it amazing how people who claim they want "open source" so frequently mean they want something with zero cost, they can run, and never modify and contribute toward?)
The experience of doing that though, and the reminder of the popularity of the original idea made me think that I could do a useful job with Git + DNS combined. That lead to DNS-API - GitHub based DNS hosting.
It is early days, but it looks like I have a few users, and if I can get more then I'll be happy.
So if you want to to store your DNS records in a (public) GitHub repository, and get them hosted on geographically diverse anycasted servers .. well you know where to go: Github-based DNS hosting.