The DE10 Nano is a great board though, huge FPGA that can hold big designs and the HPS gives you a lot of extra capabilities.
Haven't really used it much myself but fair enough :) I suspect many people on HN would be more comfortable with free opensource tools. Which is why I mention it.
The majority of the EDA world is proprietary software and huge licensing fees, free limited versions available for home/educational use if you're lucky. A bit of a culture shock for someone used to the software world!
I'm going to make you define "good". Icarus, at one point, handled way more of the standard than even Cadence did and had far fewer bugs.
And I can tell you that at least one graphics chip used to run it's validation suite through Icarus.
And I, personally, was the person who reduced our Cadence Verilog licenses by 25% once I got Icarus Verilog up and running. At the time, the EDA vendors were dragging their feet on Linux versions because you had to buy significantly more licenses if you were stuck running it on Sun equipment.
Obviously, my info is highly dated. I haven't tracked Icarus Verilog in quite a while, but code doesn't magically get worse as long as it is being actively maintained. And the original writer/maintainer (Steven Williams) is a solid developer and is still on board.