Good start

I was using Norton Commander a long time ago and still missing two panels view with Finder. ForkLift gave me this option few years ago. Now there is an alternative with Commander Pro. It has some good features, like using function keys without necessity of pressing Fn or changing the preferences, but lack some advanced features of FL despite the PRO name. So I think 2$ price tag is more adequate for now. Since it is relatively new app I will wait to see the next updates after drawing final concussions. So I start with 3 stars credit.

Alexei0912 about Commander One PRO: FTP client