MIXXX.ORG: This recent entry into the DJ software category is open source and free for all. Recently, they announced their position as the #1 app in the new Mac store. In less than 48 hours after going live they became the #1 Top Free App in the USA, Germany, and Italy. We're also one of the top 3 Apps in Brazil, Canada, France, Japan, and the UK. How did this happen? Boston-based developers Owen Williams and RJ Ryan demo their platform and tell us how you can get involved.