1. Cellphone2Second iteration of the DIY cellphone (based on the Arduino GSM shield).
2. EspThe Example-based Sensor Predictions (ESP) system applies machine learning to real-time sensor data.
3. CellphoneObsolete; see Cellphone2 and Cellphone2HW repositories instead.
4. AttinyATtiny microcontroller support for the Arduino IDE
5. A4SPreliminary Scratch extension for talking to Arduino boards running Firmata.