An extended optiboot Arduino bootloader that supports remote sketch uploading using the $0.50 nRF24L01+ modules. With all features enabled optiboot is still smaller than Arduino's stock bootloader which it replaces.
Functioning drone flight-controller / autopilot for the Arduino or cortex-m3 LPC1343.
Drones with the ESC firmware (Simon K.'s), modified to communicate I2C, report RPM, Voltage, Temperature and related modifications to the Flight Controller, minimosd.
Arduino-driven LED strips on an every-day use bike wheel displaying simple animations, text. Created a library that drives 4 strips of WS2811 simultaneously on a 16MHz Arduino.