I am looking for an open-source circuit layout routing tool (with scripting option) for custom layout design. For example: I design a NAND schematic and convert it into layout and place components (NMOS and PMOS) by myself and then auto-route it. If found Qrouter from OCD but it requires standard cells for routing. I don't want to use standard cells I just want to place individual components and then auto-route the design. I have checked KiCAD and gEDA but they are used for PCB designing and I couldn't find to control or program then with scripting. Could anyone recommend some other options for me? Can't I use VLSI routing tools without standard cells ?.