I recently went through the same Mac to Windows conversion.
For a Sketch replacement, try Lunacy by Icons8 -- it's a Sketch clone for Windows (not quite as good, but pretty damn close, and it opens even complex sketch files perfectly). It's also free.
For an iTerm replacement, use ConEmu with WSL. You'll have to fiddle around with the settings to make it look good, but it's hugely customizable, and then you can run Ubuntu or Arch or whatever else you want natively on Windows.
For a Sketch replacement, try Lunacy by Icons8 -- it's a Sketch clone for Windows (not quite as good, but pretty damn close, and it opens even complex sketch files perfectly). It's also free.
For an iTerm replacement, use ConEmu with WSL. You'll have to fiddle around with the settings to make it look good, but it's hugely customizable, and then you can run Ubuntu or Arch or whatever else you want natively on Windows.