Kupfer is a command tool heavily inspired by Quicksilver; you do not use it to search your files, you use it to summon an application or document quickly by typing the first parts of its name.

Kupfer is written using Python and has a flexible architecture. Objects that it can access are implemented in plugins, and new plugins can be written quickly.

The philosophy of Kupfer is simplicity. The implementation is simple, makes the easy things work first, and does not overdesign unnecessary parts of the program.

When you run kupfer, it launches, then anytime you type Kupfer's keybinding -- immediately its window is presented ready for a new query.