LD (Logical Desktop) is a program that allows you to do many different things with your computer, but in a consistent way. In LD, you work by composing "actions" made of one verb and one or more objects. The advantage of LD is that you specify verbs and objects in any order, with automatic hiding of the things that don't make sense. The former point enables LD to unify the "task-oriented" and "document-oriented" paradigms. The latter point enables users to compose actions much more easily. Another innovation is that you can browse your filesystem and the Web with a "recently used first" style.
Krusader is an advanced twin-panel (commander-style) file-manager for KDE 3.x, but with many extras. It provides all the file-management features you could possibly want. It also features extensive archive handling, mounted filesystem support, FTP, an advanced search module, a text viewer/editor, directory synchronization, support for file content comparisons, powerful batch renaming, and much more. It supports the following archive formats: tar, zip, bzip2, gzip, rar, ace, arj, and rpm. It can also handle other KIOSlaves such as smb:// or fish://.
OneFinger is a general-purpose GUI for composing CLI commands with the mouse. Although entirely graphical, it does not attempt to hide the underlying CLI language. It increases your productivity over classical hand-typing by caching commands typed into terminals, which tend to be highly repetitive. Repeated commands can be selected from a list, ordered by last usage time. It includes an integrated file browser that helps you insert filenames without typing them. and allows you to see only those programs that make sense with a given file.
DragStacK is a kicker applet, a stack of files. It was inspired by the drop stack of the PathFinder file manager for OS X. Users can drop as many files on it as they want. To get the files out of the stack they just need to be dragged out. The last file that was dropped on the stack is the first file that can be dragged out of it. It does not keep the files themselves in the stack, only their paths. It can also handle stacking URLs and directories.