Vores Øl (Our Beer) is a great tasting energetic beer and it's the world's first open source beer! It is based on classic ale brewing traditions but with added guarana for a natural energy-boost. [...]

The recipe and the whole brand of Our Beer is published under a Creative Commons license, which basically means that anyone can use our recipe to brew the beer or to create a derivative of our recipe. You are free to earn money from Our Beer, but you have to publish the recipe under the same license (e.g. on your website or on our forum) and credit our work.

http://www.voresoel.dk/main.php?id=70 [via Spreeblick]

Super Idee! Nur Guarana im Bier, tut das Not..? :)