Kamancha is a folk fiddle of Rajasthan. It is similar to the sarangi and saringda, in that it is a bowed instrument with a bridge set upon a taught membrane.
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Other Sites of Interest
India : North Indian folk music
How Does Music mean? Embodied Memories and the Politics of Affect in the Indian Sarangi
Bowed strings and sympathy, from violins to indian sarangis
Let's Know Music and Musical Instruments of India
Master Musicians of India: Hereditary Sarangi Players Speak
The North Indian Classical Sarangi: Its Technique and Role
Kamanche, the Bowed String Instrument of the Orient
The Acoustic Dynamics of Bridges of Bowed Instruments (An Outline of Comparative Instrument-Making)
The Natural History of the Musical Bow