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OrCad makes a great suite of design software, Capture, Layout, Pspice- Very expensive!! Electronics Workbench is great! depending on what your doing, find a student version. ExpressPCB has a free layout program downloadable at expresspcb.com
I also need a pcb design software, wich must be free, but what i vant it to do is:
i vant to make the schematic and then give the pcb size and the program must make the lyout....
i also have a ocrad free aditoin, but it's 2 advanced for me, it's just much more than i need....so a small program to do what i said upper, will do great, maybe u know some software....
How big is your company? Can you spend thousands, or hundreds, or nothing on the software? Most importantly...do you need mainstream software that is widely used by other companies so that your designs remain compatible with other designers/manufacturers? That is an important thing to keep in mind if you will be working with other engineers on the project, etc. I've ran into that problem before and it can be crippling.
Anyhow, OrCad Capture/PSPICE is a widely used platform, and what I use now (but it's pretty expensive):