This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Finding a decent free / open source UML CASE tool for Linux is a bit of nightmare. Some of the Rational tools have 30 day free trials but I found them too restrictive. For example, deployment diagrams in Rational Software Architect are pretty lame, sequence diagrams are hard to customise, and component diagrams are a joke.