CAD File Formats

EAGLE Nice, easy to use CAD/CAM software for PCB schematic and routing.
KICAD Free, open source schematic capture and PCB routing.
TARGET 3001 PCB CAD/CAM software. You can download limited demo version.

Free, open source design tools for PCB

gEDAgEDA is a free, open-source schematic capture and layout package that runs on Linux.
ZenitPCBZenitPCB is a freeware layout software.
PCBFree unix PCB editor.
FREE-PCBFreePCB is a free, open-source printed circuit board layout editor for Microsoft Windows!
TinyCADTinyCAD is a free open-source schematic editor written by Matt Pyne.
TCI3Free PCB routing and schematic capture software.
CometCADCometCAD is free (but not open-source) schematic capture and layout editor program for Windows 2k, XP, Vista and 7. The program consists of symbol, circuit and layout -editors. Quick start guide and example files are also included.
SCORE Free schematic capture software (Alfa version).
OSMOND PPCFREE MAC PCB CAD/CAM software.
MINIMAL PCB EDITOROpen source schematic capture and board layout editor for windows by OKADA Hitoshi
DESIGN SPARK PCB Free PCB and schematic design package based on Easy-PC, with no design restriction, and it doesn't tie you to any PCB manufacture.

Commercial design tools for PCB

PROTELCAD/CAM software for schematic and routing. You can download 30 days free trial. Protel offers free old-DOS based software called EasyTrax.
CR5000 (CADSTAR)CAD/CAM software for schematic and routing. Have free for download limited demo version
ORCADCAD/CAM software. No demo/evaluation version
CIRCUIT MAKERCAD/CAM software for schematic and routing. You can download limited demo version.
P-CAD 2000PCB CAD/CAM software. You can download FREE trial version.
PCB ELEGANCENice looking CAD/CAM software for schematic and routing. You can download limited demo version
EDWINCAD/CAM software for schematic and routing. You can download limited demo version
VISUALPCYou can download limited demo version.
BPECS32Very limited PCB CAD software. You can download limited demo version
AUTOENGINEER PCB CAD/CAM software. You can download limited demo version.
EXPERT PCBPCB CAD/CAM software. You can download limited demo version.
CIRCADPCB CAD/CAM software. You can download limited demo version.
LAYOUTPCB CAD/CAM software. You can download free version.
CIRCUIT LAYOUTPCB CAD/CAM software. You can download limited demo version
MCCADPCB CAD/CAM software. You can download limited demo version.
DREAM CAD Japanese PCB CAD/CAM software. You can download limited demo version.
E-CADSupermax CAD/CAM software, runs on NT. You can download limited demo version.
POWERPCBCAD/CAM software. No demo/evaluation version.
PCB ASSISTANTLow cost PCB CAD software. You can download limited demo version
PCB DESIGNERLow cost PCB CAD software. You can download limited demo version.
QCAD PCB CAD/CAM software. You can download limited demo version.
QUICK ROUTEPCB CAD/CAM software. You can download limited demo version.
WIN CIRCUIT 98 PCB CAD/CAM software. You can download limited demo version
BOARD EDITORLow cost PCB CAD software. You can download free demo version.
VUTRAXPCB CAD/CAM software. You can download limited demo version.
CIRCUIT CREATORPCB CAD/CAM software. You can download free demo version.
PADSPCBPADS PCB CAD/CAM software. You can download free limited demo version on this ftp server.
DESIGN WORKSPCB schematic capture and simulation software. You can download free evaluation version
LAY01PCB CAD/CAM software with limited demo version (200 pins) for free download.
GElectronic Low cost PCB routing and schematic capture software.
PRO-Board, PRO-NetSchematic capture and routing for AMIGA computers.
CSIEDASchematic capture and routing for PC.
VISUALPCBLow cost schematic capture, spice and routing for PC
WINBOARDCAD/CAM software for schematic and routing. You can download limited demo version.
ULTIBOARDCAD/CAM software for schematic and routing. You can download limited demo version
EASY PCPCB CAD/CAM software
RANGERPCB CAD/CAM software. You can download limited demo version
PROTEUSLow cost CAD/CAM software. You can download limited demo version.
EPD - Electronics Packaging Designer RF/hybrid/flex design tools based on AutoCAD.No demo available for direct download.
AutoTrax EdaSchematic design and PCB routing software. You can download free copy from the web site
SprintLayoutLow cost tool to create layouts for single-sided and double-sided PCBs. You can download limited demo version from the web site. NO DRC check which make this program quite useless.
CADINTSchematic capture and PCB routing. Have 30 days trial version for download.
Merlin PCB DesignerShareware for Corel Draw which allow PCBs to be routed.
WINQCADSchematic capture, PCB routing, autorute. Have free 200 pin version for download
PulsonixPCB schematic capture and routing software. 100 pin restricted demo available.
DIPTRACEPCB schematic capture and routing software. 30 days evaluation version. Not-for-profit version available allows 4 layers and 1000 pins for $125
RIMU PCB Low cost PCB schematic capture and routing software. Demo version is available for download
TopoRSchematic capture and PCB layout with some unique features as round edges auto-routing, made in Russia. Demo version is available for download
TINASchematic capture and PCB layout with analysis and spice. Demo version is available for download for EUR 1.00

Gerber CAM/viewers

GerbvGerbv is an open-source gerber viewer which runs on Linux and Windows. It is a component of the gEDA Suite of PCB tools
Gerber viewer ONLINEOnline Gerber viewer tool, no need to register or download software, just upload your ZIP and visualize all gerber files inside. Great online tool!
GC PrevueFree gerber viewer.
ViewMateFree gerber viewer
GerbToolCool Gerber CAM software. You can download limited demo version.
CAM 350Gerber CAM software. You can download limited demo version.
CAMTASTICGerber CAM software. You can download 45 days trial demo version
CAMCADPCB CAD/CAM viewer / translator. You can download limited demo versions.
CAM ExpertCAD/CAM program. You can download limited demo version.
EvgraverProgarm for control of CNC engraving machine. May be used for Gerber/HPGL viewer/convertor. You can download limited demo version
ViewPlotGerber viewer and editor.
Circuit PeopleOnline Gerber viewer.
GerberLogixGerber viewer can be download and used free for non-commercial use
PCB InvestigatorGerber viewer can be download and used 30 days free of charge.