title: What is an open source Java project I could contribute to?
body: <p>I'm looking for an open source project written in Java with a relatively low barrier to entry, ie. not hugely complex, friendly, etc.</p>
  
  <p>My background is mostly in web apps so, that'd be the best place for me to start.  Mostly, I'm just looking for some place I can do some stuff in free time and keep my chops polished.</p>
  
  <p>I plan on browsing through various public listings but thought I'd see if the Stack Overflow community had any suggestions.  Maybe someone even has a pet project...</p>