DisplayFusion - DisplayFusion will make your multi-monitor life much easier.
TotalFinder - TotalFinder is a plugin for Finder.app which adds tabs like in Chrome browser, dual panels similar to TotalCommander and more tweaks.
WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.
Path Finder - The Finder, reinvented. Path Finder is an award-winning file browser and management application for Mac OS X.
Mizage Divvy - Divvy is an entirely new way of managing your workspace.
Forklift - The most advanced dual pane file manager and file transfer client for macOS.