FreePCB, FreePCB is a free, open-source PCB editor for Microsoft Windows, released under the GNU General Public License. It was designed to be easy to learn and easy to use, yet capable of professional-quality work. It does not have a built-in autorouter, but it can use the FreeRoute web-based autorouter at www.freerouting.net

FreeRouting, The interactive push&shove router is production stable and unsurpassed in its free angle capabilities.
An autorouter is currently under development. It is already stable in the conventional 45 degree routing mode. The speed of the autorouter is still a bit slow, but the quality of the routing results is very good when compared with the results of existing autorouters. The web-based version of the router is free and is supported by the following systems. FreePCB, CadSoft-Eagle, Cadence-Allegro, Mentor-Boardstation, Mentor-Intergra-Station, Pulsonix, Cad-Design, Mecadtron, and Target3001..

Multisim / Ultiboard, Reduce design iterations using Spice simulation and virtual instrumentation. Verify circuits and locate errors before prototyping with powerful analyses and virtual instruments. Download a Free copy for evaluation at www.ni.com/multisim

Mentor Graphics,
PADS provides the ideal solution for single site and independent design teams. PADS software unites quick schematic definition with powerful layout, routing, and simulation tools in an affordable, proven flow. Evaluation software available to download.

PCB: Printed Circuit Board Editor, This interactive editor for the X11 window system. Includes a rats nest feature, design rule checks and an autorouter with a trace optimizer. Ouputs incluede Gerber, NC Drill, and Centroid data. It’s Free...