GNOME Commander is a fast and powerful graphical file manager. It has a "two-pane" interface in the tradition of Norton and Midnight Commander. It features drag'n'drop, GNOME MIME types, FTP, SFTP, and WebDAV using the GnomeVFS FTP module, SAMBA access, the ability to extend the context menu with entries to call external applications or scripts on the selected items, quick device access buttons with automatic mounting and unmounting, a fast file viewer for text and images, a history of recently accessed folders, and folder bookmarks.
Nautilus Actions is an extension for Nautilus, the GNOME file manager, which allows you to configure programs to be launched on files selected in the Nautilus interface. Each time you right-click on one or several selected files in Nautilus, Nautilus Actions will parse its configuration files to see if a program has been set for this selection. If one has been set, it will add an item to the menu that allows you to execute the program on the selected files.
Paperbox is a document browser. It lets you nicely view your ebooks, office and text documents and organize them by tags. Relying on Tracker, it is able to instantly discover all documents on your desktop and present them in a convenient way. Tags and other metadata are shared across all Tracker-based applications.