What do you miss about WinRAR? The ability to view an archive's contents without having to extract it first, and extract individual files? That can be achieved with BetterZip:
I had the same thought when i switched to Linux a few years ago - then i realized i can just run them under Wine :-P.
Though over time i switched to using Double Commander, an open source Total Commander clone written in Lazarus / Free Pascal, more than Total Commander itself since it runs natively on Linux and can do things like running programs such as xterm, but i still keep Total Commander installed since it can do some things better (or at least in a more familiar manner).