Density Altitude and Engine Tuning Calculators by Richard Shelquist
	ChEM  (a freeware Chrysler ECM Modifier Software by Geoff Allan)
	D-Cal Tuner Software for Chrysler ECM's by Derek Beland. Hot!
	QSpeedCalc  Quaife's slick program that calculates your vehicle's speed, rev drops, etc. when gear ratios, tire sizes, and engine speed are known.
	Performance Calculator 8.5  by RapidLine
	Performance and Fuel Injector Calculator (w/Rising Rate Regulator) from  Jeff Chojnacki (free download here)
	Turbo engine Calculator with Kompressor Maps by Borger Strand Engineering
	TurboFast - TurboCalc by Ray Hall Turbocharging
	TurboFlow by Derek Beland (free download)