Free CAD software
Download the collections of free CAD
utility
CAMtastic 2000
viewer 
Free DWG viewer 
Myriad OrCAD viewer 
RF simulator RFsim99 
Original Appcad for
DOS 
LT Spice
IV 
Download a free and easy RF units
converter
RF Unit
Converter 
Download a free antenna design tool with far
field analysis
MMANA-GAL
V.1.2 
Download a free and useful PCB Design Tool (by
Lorenzo)
FidoCAD
V.096 
Download a skin depth calculator (cylindrical
conductors)
Skin_Depth
Calculator 
Download a free calculator to
match combined resistors
Combres (Parallel
and Partition) 
Download a simple calculator for
attenuators in excel
Attenuators.xls 
Download Qcad Community Edition (2D
Drawings)
Qcad_2.0.5.0 CE 
Qcad - manuale
in italiano 
Download free useful transmission line
tools
TRline 
PCB_tools set 
Download a free smith-chart handler tool
SuperSmith 
Download a smart tool
for S-parameters
S-params 
Download Microsim DesignLab Evaluation 8, a very
useful PSpice
tool for analog and digital simulations, including
PCB design
Msim8 
Manuals 
Download an easy fourier demo
analyzer for DOS (but for WinAll too)
Fourier 
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