Voltnet
High voltage devices of all types, including tesla coils, Jacob's ladders, antique devices and lots of pictures.
http://www.voltnet.com/

TREK, Inc.
Provider of high-voltage devices and instrumentation, including electrostatic voltmeters, high-voltage power amplifiers, surface resistance meters, and charged-plate monitors.
http://www.trekinc.com/

High Voltage Link List
A list of links for electrostatic machines, history of physics and electricity, high voltage devices, and electronics.
http://www.coe.ufrj.br/~acmq/links.html

Tessco Technologies Incorporated
TESSCO Technologies (Nasdaq:TESS) is an industry-leading, value-added supplier of more than 30,000 critical products and solutions needed to design, build, run, maintain and use everything wireless.
http://www.tessco.com/

Acksen Ltd
Timesheet, time tracking software, purchase order software
http://www.acksen.com

High Voltage Connection
Sales representative for high voltage power supplies and other high voltage products. Includes technical articles on high voltage.
http://www.highvoltageconnection.com

MIL Electronics Home Page
MIL Electronics Inc. manufactures High Voltage, Medium Voltage, DC to DC, power supplies for applications including photomultiplier tubes, spectrometers, high voltage bias, solid state detector ion beams, transducers, and geiger tubes for use in scientific and medical applications. The power supplies are used to power photomultiplier tubes, or as electrostatic sources to bias a large variety of devices and sensors. The low voltage, low emi supplies, provide islolated convential single, dual and triple outputs, for use with high gain sensitive amplifiers and logic circuits that procesthe sensor outputs.
http://www.milelectronics.com

SafeTac Safety & Welding Products
Manufacture and supply voltage reduction devices.
http://www.safetac.com.au

Rowsons Transformers Pvt. Ltd.
Rowsons Marketing Private Limited - Service Provider of Transformers, Energy Saving Luminairies, Voltage Stabilizers, Switch Gears, Wind Solar Hybrid Products, Energy Conservation Products, LED Lights
http://www.indiamart.com/rowsons

AC Data Systems
Manufactures modular transient voltage surge suppression (TVSS) devices.
http://www.acdatasystems.com