A gathering to learn about open source software platforms to create visual and sonic arts. In the meeting we will review examples of projects and prototypes using platforms such as Pure Data, Processing, and Arduino. Participants from workshops in Spektrum are invited to present his experience and interest on using this platforms. Some advise can be give on how to continue your project developing. The Software Art community is interested to foster the use of digital platforms in combination with hardware for artistic projects in installation, performance, instrument making, interface development, and new media applications.