In a couple of lines, Cygwin and PowershellPowerShell are different tools however if you have Cygwin installed you can run the Cygwin executables within a PowershellPowerShell session. I'veI've gotten so used to PowershellPowerShell that now I no longer use grep, sort, awk, etc. ThereThere are pretty much built-in alternatives in PowershellPowerShell, and if not you can find a cmdlet out there.
The main tool I find myself using is ssh.exe, but within a PowershellPowerShell session.
WorksIt works great.