The success of GNU/Linux, free software, and open source have inspired a whole new generation of collaborative projects. Wikipedia, the online user-editable encyclopedia, is now the 6th most trafficked website in the world, according to Alexa. I have been extremely frustrated by high gas prices, so much so that I seeked out a powerful application to come to the rescue. The app that I found is called GasBuddy, and it is available for our beloved Android operating system, as well as for the Iphone. In The Linux Week in Review 42, I will describe what GasBuddy is, and how it can help you to use the collaborative concepts behind GNU/Linux and Wikipedia to save money on gas.