



The Prime Number Spiral (a.k.a. the Ulam Spiral) is formed by marking the prime numbers in a spiral arrangement of the natural numbers. This is software is for exploring the Prime Number Spiral.
Free Fear Spiral Animated Halloween Screensaver by FearIsHere.com. The sprial of fear. Skulls and witches heads flying out to care your desktop and you with this free Halloween screensaver.
SpiralTrader will help you locate low risk entry points in stocks, commodities and currency trading by finding hidden support and resistance points on charts with Fibonacci spirals. Our website contains free education material.
The free SpiralTrader.com browser will help you locate low risk entry points in stocks, commodities and currency trading byfinding hidden support and resistance points on charts with Fibonacci spirals. Our website contains free education material.

stairs48.exe
Free - JisawADay.com
Beautiful 48-pc jigsaw puzzle of a set of spiral stairs looking up to the sky.

MITCalc - Torsion Springs
$19.00 - MITCalc
The calculation is intended for the purposes of geometric and strength designs of spiral cylindrical torsion springs made of wires and rods in circular sections, loaded with a static or cyclic loading. Application is developed in MS Excel, is multi-language and supports Imperial and Metric units. Is based on ANSI, ISO and DIN standards and support many 2D and 3D CAD systems.

Helix
$19.95 - arcade games
Grab your chopper and pilot through four worlds and 100 levels of Helix! You’ll find yourself spiraling through fun and uplifting lunacy. Fluttering and winging it will get you nowhere fast; only skillful air navigation is permitted. ‘Copter pilots, are you ready to ascend to victory? Then rise to the occasion, take flight and keep your wits about you so your mission will be smooth, successful and free of gross eyeballs and headless ghouls!
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