A high performance drop-in replacement for ev3dev-lang-python. It does not support all features (eg. onboard buttons and screen), but it can be loaded concurrently with the ev3dev-lang-python. Use ...
Codatex RFID Sensor for NXT (http://www.codatex.com/lego-sensor.html) also works with the EV3 (at least with LeJOS and RobotC) but there is no driver yet for ev3dev ...