Difference between revisions of "PCB CAD programs"
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− | + | Compiled by ElCap from EEVblog Forum: http://www.eevblog.com/forum/index.php?topic=3677.0 | |
+ | |||
+ | == Reviews of PCB CAD programs == | ||
+ | [https://www.sfcircuits.com/pcb-school/pcb-design-software-comparison-guide PCB Design Software Guide by SFCircuits] Review of DipTrace, EagleCAD, OrCAD, PADS & Altium Designer | ||
+ | |||
+ | [http://predictabledesigns.com/pcb-design-software-which-one-is-best/ PCB Design Reviews by John Teel] Focused mostly on DipTrace | ||
+ | |||
+ | [http://www.limpkin.fr/index.php?post/2012/07/17/Altium-vs-Cadence%3A-a-totally-subjective-opinion Altium vs. Cadence] Review of Limpkin's switch from Cadence to Altium in 2012 | ||
+ | |||
+ | [https://www.pcbonline.com/blog/best-free-pcb-layout-software.html Top 8 Best Free PCB Design Software] Review of Free PCB Design Software - Pros and Cons | ||
+ | |||
+ | == Free/Open source == | ||
+ | [http://pcb.ui3g.com Electronic Engineers Blog] 12 Best of Electronic Engineers Blog | ||
+ | |||
+ | CircuitMaker (Altium) - http://www.altium.com/circuitmaker/overview | http://www.circuitmaker.com/ | ||
+ | |||
+ | DesignSpark (RS Components) - http://www.designspark.com/ | ||
+ | |||
+ | FreePCB - http://www.freepcb.com | ||
+ | |||
+ | Fritzing - http://fritzing.org | ||
+ | |||
+ | gEDA - http://www.gpleda.org/index.html | ||
+ | |||
+ | KiCAD - https://www.kicad.org/ | ||
+ | |||
+ | MeowCAD (web-based) - https://meowcad.com | ||
+ | |||
+ | Minimal Board Editor - http://www.suigyodo.com/online/e/index.htm (English, Japanese) | ||
+ | |||
+ | Open Circuit Design - http://opencircuitdesign.com | ||
+ | |||
+ | PCB Elegance - http://etim.net.au/pcbelegance/ | ||
+ | |||
+ | Protel/Altium AutoTrax/EasyTrax (DOS Based) - http://techdocs.altium.com/display/ALEG/Legacy+Downloads | ||
+ | |||
+ | TCI - http://b.urbani.free.fr (French) | ||
+ | |||
+ | ZenitPCB - http://www.zenitpcb.com/Index.html | ||
+ | |||
+ | TinyCAD - http://sourceforge.net/apps/mediawiki/tinycad/index.php?title=TinyCAD | ||
+ | |||
+ | EasyEDA - https://easyeda.com/editor | ||
+ | |||
+ | == Limited free version == | ||
+ | |||
+ | AutoTRAX - http://www.kov.com | ||
+ | |||
+ | CADint - http://www.cadint.se/p_free.asp | ||
+ | |||
+ | CADSTAR Express (Zuken) - http://www.zuken.com/products/cadstar/downloads/express.aspx | ||
+ | |||
+ | DipTrace - http://www.diptrace.com | ||
+ | |||
+ | Eagle (was Farnell/Newark, now Autodesk) - http://www.cadsoft.de | ||
+ | |||
+ | Layo1 PCB - http://www.baas.nl/layo1pcb/uk/downloads.htm | ||
+ | |||
+ | McCAD - http://www.mccad.com/index.html | ||
+ | |||
+ | OrCad 16.3 (Cadence) - http://www.cadence.com/products/orcad/pages/downloads.aspx#demo | ||
+ | |||
+ | Osmond PCB - http://www.osmondpcb.com/index.html (Only PCB) | ||
+ | |||
+ | WinQcad - http://www.winqcad.com | ||
+ | |||
+ | CometCAD - http://www.cometcad.com | ||
+ | |||
+ | == Commercial == | ||
+ | Allegro (Cadence) - http://www.cadence.com/products/pcb/Pages/default.aspx | ||
+ | |||
+ | Altium - http://www.altium.com | ||
+ | |||
+ | Ariadne - http://www.cad-ul.de/ariadne-eda.html (German) | ||
+ | |||
+ | AutoTRAX (Not to be confused with Protel/Altium!) - http://www.kov.com | ||
+ | |||
+ | Bartels AutoEngineer - http://www.bartels.de/bae/bae_en.htm (English, German) | ||
+ | |||
+ | BoardMaker3 - http://www.tsien.info/index.php# | ||
+ | |||
+ | Board Station (Mentor) - http://www.mentor.com/products/pcb-system-design/design-flows/boardstation | ||
+ | |||
+ | CADint - http://www.cadint.se/products.asp | ||
+ | |||
+ | CADSTAR (Zuken) - http://www.zuken.com/products/cadstar | ||
+ | |||
+ | CIRCAD - http://www.holophase.com/index.html | ||
+ | |||
+ | CircuitCREATOR - http://www.circuitcreator.com/creator/index.htm | ||
+ | |||
+ | Circuit Wizard, PCB wizard - http://www.new-wave-concepts.com/products.html | ||
+ | |||
+ | CSiEDA - http://www.csitek.co.kr (Korean) | ||
+ | |||
+ | CSiEDA - http://www.csieda.co.jp/en/csieda (Japanese, English) | ||
+ | |||
+ | CR-5000 (Zuken) - http://www.zuken.com/products/cr-5000 | ||
+ | |||
+ | DipTrace - http://www.diptrace.com | ||
+ | |||
+ | Douglas CAD/CAM - http://www.douglas.com/software/pro/prolayout.html | ||
+ | |||
+ | Dreamcad - http://www13.ocn.ne.jp/~dreamnet (Japanese) | ||
+ | |||
+ | EAGLE (was Farnell/Newark, now owned by Autodesk) - https://www.autodesk.co.uk/products/eagle/overview (formerly http://www.cadsoft.de) | ||
+ | |||
+ | Easy-PC - http://www.numberone.com/easypc.asp | ||
+ | |||
+ | EDWinXP - http://www.visionics.a.se/index.html | ||
+ | |||
+ | Expedition Enterprise (Mentor) - http://www.mentor.com/products/pcb-system-design/design-flows/expedition-enterprise | ||
+ | |||
+ | ICADPCB (Fujitsu) - http://www.fujitsu.com/my/services/software/business/icad_thirdpage.html | ||
+ | |||
+ | Layo1 PCB - http://www.baas.nl/layo1pcb/uk/index.html | ||
+ | |||
+ | McCAD - http://www.mccad.com/index.html | ||
+ | |||
+ | Orcad (Cadence) - http://www.cadence.com/products/orcad/orcad_capture/pages/default.aspx | ||
+ | |||
+ | Osmond PCB - http://www.osmondpcb.com/index.html (Only PCB) | ||
+ | |||
+ | Pads (Mentor) - http://www.mentor.com/products/pcb-system-design/design-flows/pads | ||
+ | |||
+ | PCB-Investigator - http://www.pcb-investigator.com | ||
+ | |||
+ | Proteus PCB Design - http://www.labcenter.com/products/pcb/pcb_overview.cfm | ||
+ | |||
+ | Pulsonix - http://pulsonix.com/index.asp | ||
+ | |||
+ | Rimu Schematics/PCB - http://www.hutson.co.nz | ||
+ | |||
+ | Scooter PCB - http://www.scooter-pcb.de/scooter-pcb/index.html (German) | ||
+ | |||
+ | Sprint-Layout - http://www.abacom-online.de/uk/html/sprint-layout.html | ||
+ | |||
+ | SuperCAD/SuperPCB - http://www.mentala.com/products.htm | ||
+ | |||
+ | Target 3001 - http://www.ibfriedrich.com (English, German, French) | ||
+ | |||
+ | TINA (DesignSoft) - http://www.tina.com | ||
+ | |||
+ | Ultiboard (National Instruments) - http://www.ni.com/ultiboard | ||
+ | |||
+ | Vutrax - http://www.vutrax.co.uk/index.htm | ||
+ | |||
+ | WinCircuit - http://alain.michel13.free.fr/Anglais.html | ||
+ | |||
+ | WinQcad - http://www.winqcad.com | ||
+ | |||
+ | XL designer (Seetrax) - http://www.xldesigner.com | ||
+ | |||
+ | Zuken CR-5000 - http://www.zuken.com/en/products/pcb-design/cr-5000 | ||
+ | |||
+ | Techno Tronix (Complete Turnkey PCB) - http://www.technotronix.us/turnkey.html | ||
+ | |||
+ | PCB Assembly (PCB Material Management) - http://www.4pcbassembly.com/services/pcb_material_management.html | ||
+ | |||
+ | AiPCBA ( Turnkey PCB Assembly) - https://www.aipcba.com/turnkey-pcb-assembly.html | ||
+ | |||
+ | == Translations == | ||
+ | |||
+ | E-studio Pro - http://www.elgris.com | ||
+ | |||
+ | Schematic translation tool : OrCAD, Concept, DxDesigner, PADS Powerlogic, EAGLE, EDIF, Altium Designer, PCAD, CADStar, etc. | ||
+ | |||
+ | == Libraries == | ||
+ | |||
+ | PCB Library Expert - http://www.pcblibraries.com | ||
+ | |||
+ | You enter component dimension data and the tool automatically makes the IPC-7351 compliant footprints along with your preferences. The tool exports to all the major CAD programs. | ||
+ | |||
+ | SnapEDA - http://www.snapeda.com | ||
+ | |||
+ | Free schematic symbols and PCB footprints that export to nearly every electronics CAD tool (OrCAD, Allegro, Eagle, Altium, KiCad, and Pulsonix). | ||
+ | |||
+ | == Free SW for PCB order service (no gerber files export) == | ||
+ | |||
+ | ECAD Pro - http://www.pcbdesignandfab.com (gerber files $25/board) | ||
+ | |||
+ | Expresspcb - http://www.expresspcb.com | ||
+ | |||
+ | Pad2Pad - http://www.pad2pad.com (Gerber files for $25 per design if Pad2Pad fabricates boards, $50 for Gerber exports with no fabrication) | ||
+ | |||
+ | PCB123 - http://www.sunstone.com/PCB123-CAD-Software.aspx (gerber files $100/board) | ||
+ | |||
+ | PCB Artist - http://www.4pcb.com/free-pcb-layout-software | ||
+ | |||
+ | Target 3001 (PCB Pool edition) - http://www.pcb-pool.com/ppuk/service_downloads.html (gerber with proto) | ||
+ | |||
+ | == Gerber tools == | ||
+ | [http://pcb.ui3g.com Utility programs Download] Utility programs Gerber tools Download | ||
+ | |||
+ | DFM Now! - http://www.numericalinnovations.com/dfmnow.html | ||
+ | |||
+ | GCPrevue (Graphicode) - http://www.graphicode.com/Download_GC-Prevue_and_Free_Trials | ||
+ | |||
+ | GerberLogix - http://www.easylogix.de/products_detail.php?prog_id=1 | ||
+ | |||
+ | GerbTool - http://www.wssi.com/index.php?option=com_content&task=section&id=16&Itemid=167 | ||
+ | |||
+ | gerbv - http://gerbv.sourceforge.net | ||
+ | |||
+ | GerbView - Built-in gerber viewer for KiCad. https://www.kicad.org/ | ||
+ | |||
+ | Online-Gerber-Viewer - http://www.gerber-viewer.com | ||
+ | |||
+ | Viewplot - http://www.viewplot.com | ||
+ | |||
+ | == PCB panelizing == | ||
+ | |||
+ | CAM 350 - http://www.downstreamtech.com/cam350.php | ||
+ | |||
+ | FAB 3000 - http://www.numericalinnovations.com/fab3000.html | ||
+ | |||
+ | == Stripboard/Veroboard layout tools == | ||
+ | |||
+ | DIY Layout Creator - http://diy-fever.com/sofware/diylc/ | ||
+ | |||
+ | LochMaster - http://www.abacom-online.de/uk/html/lochmaster.html | ||
+ | |||
+ | Stripboard Designer - http://www.freedownloadscenter.com/Multimedia_and_Graphics/Misc__Graphics_Tools/StripBoard_Designer.html | ||
+ | |||
+ | Stripboard Magic - http://www.marlwifi.org.nz/other/stripboard-magic | ||
+ | |||
+ | Stripes - http://sites.google.com/site/libby8dev/stripes | ||
+ | |||
+ | VeeCAD - http://veecad.com/ | ||
+ | |||
+ | VeroCAD - http://xtronic.org/download/verocad-3-veroboard/ | ||
+ | |||
+ | VeroDes - http://www.heyrick.co.uk/software/verodes/ | ||
+ | |||
+ | VeroRoute - http://sourceforge.net/projects/veroroute/ | ||
+ | |||
+ | == Simulation - Free == | ||
+ | Analog Devices version of NI Multisim - http://www.analog.com/en/amplifier-linear-tools/multisim/topic.html | ||
+ | |||
+ | 5Spice - http://www.5spice.com/ (not free for commercial use) | ||
+ | |||
+ | Cider - http://embedded.eecs.berkeley.edu/pubs/downloads/cider/index.htm | ||
+ | |||
+ | Circuit Simulator Applet - http://www.falstad.com/circuit/ (iPad/iPhone version available, iCircuit - NOT FREE) | ||
+ | |||
+ | KiCad - Has support for Ngspice https://www.kicad.org/ | ||
+ | |||
+ | Logisim - http://ozark.hendrix.edu/~burch/logisim/ | ||
+ | |||
+ | LTspice IV (Linear Technology) - http://www.linear.com/designtools/software/ | ||
+ | |||
+ | Mindi (Microchip) - http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en537206 | ||
+ | |||
+ | Ngspice - http://ngspice.sourceforge.net/screens.html | ||
+ | |||
+ | Qucs - http://qucs.sourceforge.net/ | ||
+ | |||
+ | Simetrix - http://www.simetrix.co.uk/site/demo.html | ||
+ | |||
+ | TINA-TI (Texas Instruments) - http://focus.ti.com/docs/toolsw/folders/print/tina-ti.html | ||
+ | |||
+ | XSPICE - http://users.ece.gatech.edu/~mrichard/Xspice/ | ||
+ | |||
+ | == Simulation - Commercial == | ||
+ | |||
+ | AIM Spice - http://www.aimspice.com/ | ||
+ | |||
+ | B2 Spice - http://www.beigebag.com/ | ||
+ | |||
+ | Circuit Wizard - http://www.new-wave-concepts.com/products.html | ||
+ | |||
+ | ICAP/4, etc.. - http://www.intusoft.com/default.htm (Limited Free version available) | ||
+ | |||
+ | Micro Cap - http://www.spectrum-soft.com/index.shtm (Limited Free version available) | ||
+ | |||
+ | NI Multisim (National Instruments) - http://www.ni.com/multisim/ | ||
+ | |||
+ | PSpice (Cadence) - http://www.cadence.com/products/orcad/pspice_simulation/pages/default.aspx (Limited Free version available) | ||
+ | |||
+ | Simetrix - http://www.simetrix.co.uk/site/index.html | ||
+ | |||
+ | Super Spice (Anasoft) - http://www.anasoft.co.uk/ (Limited Free version available) | ||
+ | |||
+ | TopSpice - http://penzar.com/topspice/topspice.htm (Limited Free version available) | ||
+ | |||
+ | WinSpice - http://www.winspice.com/ | ||
+ | |||
+ | == 3D Models == | ||
+ | |||
+ | http:///beta-prototypes.com/ | ||
+ | |||
+ | http://grabcad.com/ | ||
+ | |||
+ | http://www.3dcontentcentral.com/ | ||
+ | |||
+ | http://www.pcb-3d.com/ |
Latest revision as of 11:32, 2 January 2023
Compiled by ElCap from EEVblog Forum: http://www.eevblog.com/forum/index.php?topic=3677.0
Contents
Reviews of PCB CAD programs[edit]
PCB Design Software Guide by SFCircuits Review of DipTrace, EagleCAD, OrCAD, PADS & Altium Designer
PCB Design Reviews by John Teel Focused mostly on DipTrace
Altium vs. Cadence Review of Limpkin's switch from Cadence to Altium in 2012
Top 8 Best Free PCB Design Software Review of Free PCB Design Software - Pros and Cons
Free/Open source[edit]
Electronic Engineers Blog 12 Best of Electronic Engineers Blog
CircuitMaker (Altium) - http://www.altium.com/circuitmaker/overview | http://www.circuitmaker.com/
DesignSpark (RS Components) - http://www.designspark.com/
FreePCB - http://www.freepcb.com
Fritzing - http://fritzing.org
gEDA - http://www.gpleda.org/index.html
KiCAD - https://www.kicad.org/
MeowCAD (web-based) - https://meowcad.com
Minimal Board Editor - http://www.suigyodo.com/online/e/index.htm (English, Japanese)
Open Circuit Design - http://opencircuitdesign.com
PCB Elegance - http://etim.net.au/pcbelegance/
Protel/Altium AutoTrax/EasyTrax (DOS Based) - http://techdocs.altium.com/display/ALEG/Legacy+Downloads
TCI - http://b.urbani.free.fr (French)
ZenitPCB - http://www.zenitpcb.com/Index.html
TinyCAD - http://sourceforge.net/apps/mediawiki/tinycad/index.php?title=TinyCAD
EasyEDA - https://easyeda.com/editor
Limited free version[edit]
AutoTRAX - http://www.kov.com
CADint - http://www.cadint.se/p_free.asp
CADSTAR Express (Zuken) - http://www.zuken.com/products/cadstar/downloads/express.aspx
DipTrace - http://www.diptrace.com
Eagle (was Farnell/Newark, now Autodesk) - http://www.cadsoft.de
Layo1 PCB - http://www.baas.nl/layo1pcb/uk/downloads.htm
McCAD - http://www.mccad.com/index.html
OrCad 16.3 (Cadence) - http://www.cadence.com/products/orcad/pages/downloads.aspx#demo
Osmond PCB - http://www.osmondpcb.com/index.html (Only PCB)
WinQcad - http://www.winqcad.com
CometCAD - http://www.cometcad.com
Commercial[edit]
Allegro (Cadence) - http://www.cadence.com/products/pcb/Pages/default.aspx
Altium - http://www.altium.com
Ariadne - http://www.cad-ul.de/ariadne-eda.html (German)
AutoTRAX (Not to be confused with Protel/Altium!) - http://www.kov.com
Bartels AutoEngineer - http://www.bartels.de/bae/bae_en.htm (English, German)
BoardMaker3 - http://www.tsien.info/index.php#
Board Station (Mentor) - http://www.mentor.com/products/pcb-system-design/design-flows/boardstation
CADint - http://www.cadint.se/products.asp
CADSTAR (Zuken) - http://www.zuken.com/products/cadstar
CIRCAD - http://www.holophase.com/index.html
CircuitCREATOR - http://www.circuitcreator.com/creator/index.htm
Circuit Wizard, PCB wizard - http://www.new-wave-concepts.com/products.html
CSiEDA - http://www.csitek.co.kr (Korean)
CSiEDA - http://www.csieda.co.jp/en/csieda (Japanese, English)
CR-5000 (Zuken) - http://www.zuken.com/products/cr-5000
DipTrace - http://www.diptrace.com
Douglas CAD/CAM - http://www.douglas.com/software/pro/prolayout.html
Dreamcad - http://www13.ocn.ne.jp/~dreamnet (Japanese)
EAGLE (was Farnell/Newark, now owned by Autodesk) - https://www.autodesk.co.uk/products/eagle/overview (formerly http://www.cadsoft.de)
Easy-PC - http://www.numberone.com/easypc.asp
EDWinXP - http://www.visionics.a.se/index.html
Expedition Enterprise (Mentor) - http://www.mentor.com/products/pcb-system-design/design-flows/expedition-enterprise
ICADPCB (Fujitsu) - http://www.fujitsu.com/my/services/software/business/icad_thirdpage.html
Layo1 PCB - http://www.baas.nl/layo1pcb/uk/index.html
McCAD - http://www.mccad.com/index.html
Orcad (Cadence) - http://www.cadence.com/products/orcad/orcad_capture/pages/default.aspx
Osmond PCB - http://www.osmondpcb.com/index.html (Only PCB)
Pads (Mentor) - http://www.mentor.com/products/pcb-system-design/design-flows/pads
PCB-Investigator - http://www.pcb-investigator.com
Proteus PCB Design - http://www.labcenter.com/products/pcb/pcb_overview.cfm
Pulsonix - http://pulsonix.com/index.asp
Rimu Schematics/PCB - http://www.hutson.co.nz
Scooter PCB - http://www.scooter-pcb.de/scooter-pcb/index.html (German)
Sprint-Layout - http://www.abacom-online.de/uk/html/sprint-layout.html
SuperCAD/SuperPCB - http://www.mentala.com/products.htm
Target 3001 - http://www.ibfriedrich.com (English, German, French)
TINA (DesignSoft) - http://www.tina.com
Ultiboard (National Instruments) - http://www.ni.com/ultiboard
Vutrax - http://www.vutrax.co.uk/index.htm
WinCircuit - http://alain.michel13.free.fr/Anglais.html
WinQcad - http://www.winqcad.com
XL designer (Seetrax) - http://www.xldesigner.com
Zuken CR-5000 - http://www.zuken.com/en/products/pcb-design/cr-5000
Techno Tronix (Complete Turnkey PCB) - http://www.technotronix.us/turnkey.html
PCB Assembly (PCB Material Management) - http://www.4pcbassembly.com/services/pcb_material_management.html
AiPCBA ( Turnkey PCB Assembly) - https://www.aipcba.com/turnkey-pcb-assembly.html
Translations[edit]
E-studio Pro - http://www.elgris.com
Schematic translation tool : OrCAD, Concept, DxDesigner, PADS Powerlogic, EAGLE, EDIF, Altium Designer, PCAD, CADStar, etc.
Libraries[edit]
PCB Library Expert - http://www.pcblibraries.com
You enter component dimension data and the tool automatically makes the IPC-7351 compliant footprints along with your preferences. The tool exports to all the major CAD programs.
SnapEDA - http://www.snapeda.com
Free schematic symbols and PCB footprints that export to nearly every electronics CAD tool (OrCAD, Allegro, Eagle, Altium, KiCad, and Pulsonix).
Free SW for PCB order service (no gerber files export)[edit]
ECAD Pro - http://www.pcbdesignandfab.com (gerber files $25/board)
Expresspcb - http://www.expresspcb.com
Pad2Pad - http://www.pad2pad.com (Gerber files for $25 per design if Pad2Pad fabricates boards, $50 for Gerber exports with no fabrication)
PCB123 - http://www.sunstone.com/PCB123-CAD-Software.aspx (gerber files $100/board)
PCB Artist - http://www.4pcb.com/free-pcb-layout-software
Target 3001 (PCB Pool edition) - http://www.pcb-pool.com/ppuk/service_downloads.html (gerber with proto)
Gerber tools[edit]
Utility programs Download Utility programs Gerber tools Download
DFM Now! - http://www.numericalinnovations.com/dfmnow.html
GCPrevue (Graphicode) - http://www.graphicode.com/Download_GC-Prevue_and_Free_Trials
GerberLogix - http://www.easylogix.de/products_detail.php?prog_id=1
GerbTool - http://www.wssi.com/index.php?option=com_content&task=section&id=16&Itemid=167
gerbv - http://gerbv.sourceforge.net
GerbView - Built-in gerber viewer for KiCad. https://www.kicad.org/
Online-Gerber-Viewer - http://www.gerber-viewer.com
Viewplot - http://www.viewplot.com
PCB panelizing[edit]
CAM 350 - http://www.downstreamtech.com/cam350.php
FAB 3000 - http://www.numericalinnovations.com/fab3000.html
Stripboard/Veroboard layout tools[edit]
DIY Layout Creator - http://diy-fever.com/sofware/diylc/
LochMaster - http://www.abacom-online.de/uk/html/lochmaster.html
Stripboard Designer - http://www.freedownloadscenter.com/Multimedia_and_Graphics/Misc__Graphics_Tools/StripBoard_Designer.html
Stripboard Magic - http://www.marlwifi.org.nz/other/stripboard-magic
Stripes - http://sites.google.com/site/libby8dev/stripes
VeeCAD - http://veecad.com/
VeroCAD - http://xtronic.org/download/verocad-3-veroboard/
VeroDes - http://www.heyrick.co.uk/software/verodes/
VeroRoute - http://sourceforge.net/projects/veroroute/
Simulation - Free[edit]
Analog Devices version of NI Multisim - http://www.analog.com/en/amplifier-linear-tools/multisim/topic.html
5Spice - http://www.5spice.com/ (not free for commercial use)
Cider - http://embedded.eecs.berkeley.edu/pubs/downloads/cider/index.htm
Circuit Simulator Applet - http://www.falstad.com/circuit/ (iPad/iPhone version available, iCircuit - NOT FREE)
KiCad - Has support for Ngspice https://www.kicad.org/
Logisim - http://ozark.hendrix.edu/~burch/logisim/
LTspice IV (Linear Technology) - http://www.linear.com/designtools/software/
Mindi (Microchip) - http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en537206
Ngspice - http://ngspice.sourceforge.net/screens.html
Qucs - http://qucs.sourceforge.net/
Simetrix - http://www.simetrix.co.uk/site/demo.html
TINA-TI (Texas Instruments) - http://focus.ti.com/docs/toolsw/folders/print/tina-ti.html
XSPICE - http://users.ece.gatech.edu/~mrichard/Xspice/
Simulation - Commercial[edit]
AIM Spice - http://www.aimspice.com/
B2 Spice - http://www.beigebag.com/
Circuit Wizard - http://www.new-wave-concepts.com/products.html
ICAP/4, etc.. - http://www.intusoft.com/default.htm (Limited Free version available)
Micro Cap - http://www.spectrum-soft.com/index.shtm (Limited Free version available)
NI Multisim (National Instruments) - http://www.ni.com/multisim/
PSpice (Cadence) - http://www.cadence.com/products/orcad/pspice_simulation/pages/default.aspx (Limited Free version available)
Simetrix - http://www.simetrix.co.uk/site/index.html
Super Spice (Anasoft) - http://www.anasoft.co.uk/ (Limited Free version available)
TopSpice - http://penzar.com/topspice/topspice.htm (Limited Free version available)
WinSpice - http://www.winspice.com/