The turret at the end of Curiosity's robotic arm holds five devices. In this view, the drill is at the six o'clock position.
Clockwise from six o'clock: Collection and Handling for In-situ Martian Rock Analysis device, or CHIMRA, includes a soil scoop and a set of chambers and labyrinths for sieving, sorting and portioning samples of rock powder or soil for delivery to analytical instruments.
At 10 o'clock is the Alpha Particle X-ray Spectrometer. Behind the forearm are the Mars Hand Lens Imager and the Dust Removal Tool.