Directory Opus (or "DOpus" as its users tend to call it) is a file manager program, originally written for the Amiga computer system in the early to mid-1990s.

Directory Opus was originally developed by, and is still written by, Australian Jonathan Potter.

Directory Opus has evolved since its first release in 1990 as a basic two-panel file manager.

The full version of Magellan II is included for free with AmiKit package.

The open source Worker (file manager) is heavily inspired by the Directory Opus 4 series.