Drawing the VLSI circuit
There are several tools to create VLSI designs: most of them are commercial and cost quite some money, like Cadence Virtuoso or Synopsys. And what is more expensive are the libraries for the process technology nodes, usually provided by foundries.

But there are also some open source ones, like Electric. You find more software for Electronic design at this page or this. But I suppose that, as for commercial software, you might need technology-specific libraries that may not be available for some of these tools.