sPlan is described as 'Software with already many thousands enthusiastic users. You need a software to design your schematic circuit diagrams easy and fast? Then there is no way around sPlan! No matter if you only want to sketch a little circuit diagram or if you need to design a big' and is an app in the education & reference category. There are more than 10 alternatives to sPlan for a variety of platforms, including Windows, Mac, Linux, Web-based and Android apps. The best sPlan alternative is Square Sketch. It's not free, so if you're looking for a free alternative, you could try Wiring Diagram or myNetPCB. Other great apps like sPlan are ExpressSCH, XCircuit, FidoCADJ and Elwi.