The Electronic Dholak
The Dholak is a barrel shaped hand drum originating in Northern India, with two membranes on either side of the barrel. Two musicians play the Dholak. The first musician strikes the two membranes with their left and right hands. The second musician sits on the other side of the drum, striking the barrel with a hard object, such as a spoon or stick, giving rhythmic hits similar to a woodblock sound. We created the Electronic Dholak inspired by the collaborative nature of this traditional drum. Two musicians play the EDholak, the first striking both heads of the double-sided drum, and the second keeping time with a “Digital Spoon” and manipulating the sounds of the first player with custom built controls on the barrel of the drum and in software. We further explore multiplayer controllers by networking four drummers playing two EDholaks at the two geographically diverse sites.
http://www.cs.princeton.edu/sound/research/controllers/edholak

DigitalDoo
The DigitalDoo is a traditional aboriginal digeridoo, enhanced with various electronic sensors, signal processing circuits, and a six channel hemispherical loud speaker. It allows the capture and processing of the sounds from the digeridoo, and the control of various synthetic sound sources.
http://www.cs.princeton.edu/~prc/digidoo.html

The Electronic Violin and RBow
The RBow consists of a traditional violin bow with motion, position, and pressure sensors, which can be played by itself, using other surfaces as a point of resistance, or on any violin. Trueman uses it primarily with a six-string, solid-body electric violin, and in combination with pitch, amplitude, and overtone detection of the electric violin signal.
http://silvertone.princeton.edu/~dan/rbow/