I have punched out a bunch of Ruby libraries and Ruby based tools recently, some of which are now mature enough to be set loose on the world.

They are all "beta" and will probably always be, but they are functional and error free enough that I use them on a daily basis.

There is a trivial Ruby IP management and DNS library, a bulk DNS lookup tool for when you can't zone transfer and an encoder for when you are messing about with web applications. Check them out on the downloads page.