Froogle:
Developed by Google, Inc. One of the most promising price comparison sites to date.
BizRate:
One of the largest price search sites. Over 30 million products listed.
Shopping.com:
Child of Dealtime and Epinions, now merged to provide you with three shopping search engines that feature your products separately, yet the same.
Yahoo Shopping:
Complete Yahoo Shopping data feed creation and maintenance solutions.
MSN Shopping:
Complete MSN Shopping data feed creation and maintenance solutions.
NexTag Shopping:
Complete NexTag data feed creation and maintenance solutions.
PriceGrabber Shopping:
Complete PriceGrabber data feed creation and maintenance solutions.
PAiA Theremax
Information about theremin kit from PAiA.
Jake Rothman Theremin
Theremin sales, design, and manufacture. Range of ready made theremins and kits, and midi converter.
Wavefront Technologies
Makers of two models af theremins, and also a MIDI interface
Australian Theremin Kits
Simple kit. The completed instrument puts out a pure sine wave tone.
Theremaniacs Theremin and Harmonic Percolators
Manufactures a pitch only Theremin with changeable timbre. Also presented is the Harmonic Percolator, a distortion pedal.
EffectsForLess.com: Theremins
Moog Etherwave Theremins for sale: standard, signature, and kit versions.