The Poggendorff Illusion
A study attributing the illusion to summed effects of cardinal axes in the observer's field of view and of salient axes in the figures.
http://www.soapsheet.com

Axes Computer Solutions
Gussago
http://www.axes.it/

Helko-Werk
Manufacturers of axes, mauls, and hatchets.
http://www.helko.de/produktgr_e.htm

Gränsfors Bruk
Handmade in Sweden these axes are made for hard labour as well as pleasure.
http://www.gransfors.com/

Graphics Routines
Code to evaluate mathematical functions, plot data on axes, and display 3-D wireframes from any angle
http://ourworld.compuserve.com/homepages/hamm/

Estwing
Manufacturer of hand-held striking and struck tools for geology and other uses (hammers, hoe-picks, chisels, axes, and pry bars).
http://www.estwing.com/

Neil's Texas Indian Artifacts
Arrowheads and stone age tools. Archaic flint knives, axes, and spear points.
http://www.angelfire.com/tx3/stone3/index.html

George Kahler Sales LLC
George Kahler Sales, Authorized Husqvarna and Oregon Dealer. Logging, Lumber and Lawn Care Products. Rome, New York
http://www.gksales.net/

Shandong Pangu Tools Co.,Ltd
SHANDONG PANGU TOOLS CO.,LTD
http://www.pangutools.com/

Precision Pneumatics
Announcing the Dual Slide - the ONLY two-axis pneumatic positioning system of its kind. Perfect for pick and place applications in automation and assembly.
http://www.precision-pneumatics.com