"Open folder in new window" for Finder? In Finder, how do you open a folder in a new window, while the existing window keeps the same view?   

All file managers I've ever used (on Linux only) have something like "Open folder in new window" in the right-click menu for a folder.  Does Finder have this feature in a hidden way, or is there another file manager I should be using on Mac?
Just hold down the Command key (Cmd) while double clicking the folder and it will open in a new Finder Tab.

In Finder Preferences, you can specify to open in a new window instead of a tab.