I used to spend a lot of time writing helpful tools for myself in Ruby. I haven't done much in a while. I've dumped the old skeletons of work in a directory. Feel free to try anything out, but I can't guarantee how useful it'll be.
Some of the abandoned code includes projects like Ruby/BloomFilter,
Ruby/PkiToolkit, Ruby/QuickCert, a NIST ICAT vulnerability database parser, and
a simple, extensible certificate authority.