CAD file formats
Open Design Alliance - Non-profit industry consortium which provides program libraries to read and write DWG and DXF files.
Open Design Alliance
DXF Specifications - Autodesk documentation on versions of DXF from Release 13 to current.
Autodesk - AutoCAD - DXF Reference
Official homepage collada
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DGNLib - DGNLib: a free Microstation DGN (ISFF) program library
DGNLib: Microstation DGN (ISFF) Reader
Microstation 95/ISFF Description (pdf) - Information on the ISFF/DGN file format as distributed with Microstation 95.
OpenDGN - Bentley's OpenDGN initiative
Bentley |
OpenDGN Overview
EDIF web site
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The NIST RS274NGC Interpreter mel nist personnel pubs web
The NIST RS274NGC Interpreter - Version 3
TARGET 3001!
PCB Software, PCB CAD, PCB design, TARGET 3001! Schematic and PCB Layout CAD Design Software, Schaltplan und Platinen CAD/CAE, Simulation, Autorouter, Autoplacer, ASIC design, chip design
Cadence Design Systems
Cadence Design Systems
Gerber Scientific, Inc
Gerber Scientific - World Class Automation
IBIS Home ibis
ANSI/EIA-656-A IBIS Home Page
Intergraph Standard File Formats (Element Structure)
Intergraph Standard File Formats (Element Structure)
Mentor Graphics website mentor
Mentor Graphics :: The EDA Technology Leader
Official Parasolid web page ugs products open
UGS: PLM Components: Parasolid
ASCO tool - A SPICE circuit optimizer used to design high performance circuits
ASCO project :: homepage
Spice OPUS - Spice with integrated optimization utilities uni spice welcome
Spice OPUS homepage
LTSPICE - A very good free SPICE simulator
A BRIEF HISTORY OF SPICE history
SPICE History
download ng-SPICE project
SourceForge.net: Files
Ngspice homepage
Ngspice circuit simulator
download TclSpice projects
SourceForge.net: TclSpice
TclSpice homepage
Tclspice
The Spice Page berkeley classes spice
The Spice Home Page
SPICE on gEDA HOWTO spice simulation
SPICE simulation
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