Unreal Commander is a straightforward file manager for Windows.

Unreal Commander Features:

Two-panel interface
UNICODE support
Extended search of files
Multi-rename tool
Synchronization of directories
Support of archives ZIP, RAR, ACE, CAB, JAR, TAR, LHA, GZ, TGZ, ARJ
Built-in FTP client
Thumbnail mode
Folder tabs
Support of WLX/WCX/WDX plugins
Build-in viewer and quick view function
Network support
Drag and Drop Support
History and Hotlist functions
Copy/move/delete files background mode support
Deleting files with WIPE
Background pictures support
Unreal Commander Visual styles