Here at IntroSpectrum we benefit from Open Source Software at every level of our organization, from the operating systems on our servers to the word processors on our desktops.
That's why we're serious about supporting Open Source and giving back to the community. Below are the projects we've released so far. If anything looks interesting... start coding and join in the fun!
http://github.com/IntroSpectrum/chargify-scala
Chargify is a great service for automating the management of recurring subscriptions. This is a Scala/Java binding for the Chargify REST API.
http://github.com/IntroSpectrum/redline
This is a pure Java RPM library that supports reading and creating Linux RPM packages. Includes an Ant task for automating RPM generation as part of your build process.