Best Free Circuit Simulator January 21, 2006
I have been using LTspice (a.k.a. SwitcherCAD III) for about 3 years as my main circuit simulation tool and have been very happy with it. Linear Technology has generously made it available free on their web site, and it is full-featured, fast, and seems to converge very well. I‚Äôll be posting some of my simulation tips and tricks, so I highly recommend that you download it and get familiar with it. They also have a great user’s group to help get you going.