My project of the day (or "POTD") is GitHub API for Java — a library for accessing GitHub programmatically.
As the Hudson community is embracing plugins developed in Git more and more, I needed to interact with GitHub as a part of the community infrastructure automation. I did a quick Google search to locate existing implementations, but unfortunately I couldn't find anything good. So I decided to just write my own. Thanks to a reasonable API design of GitHub and a good documentation, it was very easy to do so. The trick is to use the right library, which handles most of the JSON/Java databinding.
The library so far only covers the part of the GitHub API that I care about, which is a small subset of the entire GitHub API. But hopefully this library is easy enough to extend so that other people can add the remaining APIs. The source code is available inGitHub.