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The Heirloom Project
Developer(s)Gunnar Ritter
Stable release
070715 / July 15, 2007; 15 years ago (2007-07-15)
Written inC
Operating systemUnix-like
Available inEnglish
LicenseVarious, including CDDL

The Heirloom Project is a collection of traditional Unix utilities. Most of them are derived from original Unix source code, as released as open-source by Caldera and Sun.

The project has the following components:

Although in general the intention of the project is to provide versions of Unix programs whose behavior mimics that of the classic versions, some improvements have been made. In particular, many of the Heirloom programs have been adapted to handle UTF-8 Unicode. Most programs have both a classic version and a POSIX conformant variant.