File manager software programs are intended to replace Windows Explorer. They essentially provide a window to manipulate file directories and access documents. Here are a few recommended file managers if you would prefer to have additional functionality than Windows Explorer offers.
Universal Explorer: This is a free software tool 
designed for use on PCs to replace Windows Explorer. It offers the capability to view documents without opening them and to compress documents/ files into ZIP folders.
PowerDesk: PowerDesk provides the capability to simultaneously search over multiple drives. It will also customize file folders, such as color coding, labeling, and icon images.
Speedy Organizer: A simple document management system that essentially replaces Windows Explorer and offers good search functionality. Mainly for small- to medium-sized businesses.
Otixo: A file manager app specifically designed for cloud-based applications such as Dropbox, Google Docs, SkyDrive, Picasa, etc.