I absolutely love Diptrace. It has a free version with all libraries included. Over the years though I have progressively upgraded it to the "standard" level (w

I absolutely love Diptrace. It has a free version with all libraries included. Over the years though I have progressively upgraded it to the "standard" level (which allows 6 layers and 1000 nodes) when they have sales. My own microcontroller designs with GPS and bluetooth, OLED displays, serial ports etc. have not passed 500 nodes.