Windows: The right-click menu already has some great features. If you want to supercharge it even more, however, Right-Click Enhancer brings a host of new options.
The free version of the app allows you to add options such as Copy or Move to folder, which allow you to move files around without navigating directly to each location. You can also enable an option to open a command prompt in Admin mode at the selected folder right from the context menu. The professional version ($10 with a free trial) can remove unwanted entries, add sub folders in the right click menu, and create shortcuts to specific apps or locations.
Installing the free version does include some offers for crapware, but the portable version seems to be devoid of this, as is the professional version for obvious reasons.