PRO Regulator
Voltage regulator repair and services of models of Basler, Delco, EM, and GE.
http://www.proreg.net

PID controller design and tuning on Internet
PID controller laboratory providing free interactive applets for robust PID tuning, design and loop simulation based on known or unknown process model
http://www.pidlab.com

HARDI sprayer Controller and monitor
HARDI products include field sprayers, liftmounted sprayers, self propelled, orchard and wine sprayers, handheld
http://www.hardi-international.com/Product_and_Solutions/Monitors_and_Controllers/default.htm

ControlSim - Spreadsheet based simulation of PID controller and process
ControlSim is a simulation of a PID controller and a simple process model used for training and practice in controller tuning, for purchase and download from site.
http://www.jashaw.com/ebooks/simorder.html

Tuning a PID Controller
Describes the different types of controller. Addresses efficiency and stability aspects.
http://www.newportus.com/Products/Techncal/techncal.htm

Nay-seven
Vst MIDI controller for the Korg ES-1. Offers a tuner for each pad, channel change, and editable labels for each controller.
http://nay-seven.com/Kergos-util_en.htm

LIMB
Limb PHP Web Application Framework
http://www.limb-project.com/

ExtraTech Corporation
Automate your Industrial application with a motion control solution from ExtraTech Corporation. Visit our site for technical information about our motion control products including pendants, drivers, and much more.
http://www.extratech.com

HighPoint Technologies
High performance storage devices for personal computers including the HPT366/368 Ultra66 IDE controller and the IDE RAID controller.
http://www.highpoint-tech.com/

Xanalog Corporation
Provider of Hardware-in-the-Loop Testing and Rapid Controller Protoyping Software, Hardware, and Simulation Expertise for the Control Systems Engineer.
http://www.xanalog.com/