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

GeekAlarm!
Desktop alarm for keeping track of taking a break while using the computer and enforcing a break. [Windows and Linux]
http://www.geekalarm.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/

Fleetwood Aluminum Products, Inc.
FLEETWOOD WINDOWS & DOORS: Fleetwood is the leading manufacturer of custom luxury windows and doors, featuring fully custom, energy efficient products.
http://www.fleetwoodusa.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/