Ubuntu's GNOME Nautilus

Nautilus is the Swiss Army knife of the GNOME world. Nautilus is a file manager that helps you to graphically use and manage files, folders, and other resources found on your computer. Nautilus is developed as part of the GNOME project. Linux directories are the same as Windows folders.

Nautilus is an open source file manager that Ubuntu supplies to help maneuver around your computer. Nautilus is equivalent to Windows Explorer and provides all the facilities that you need to work with files, folders, and network file shares. You can start Nautilus by either

• Double-clicking any desktop icon.

• Clicking the Places menu and choosing any of the options (other than Search for Files).

Each option opens Nautilus within a specific context. The Nautilus contexts associated with each menu option are:

• Home Folder: Opens with a view of your home directory.

• Desktop: Displays your desktop directory in your home directory.

• Computer: Shows your computer disk drives.

More here