These are here for historical reasons.

difmplay (2009–2014)

This was a script to play free and paid music streams from DI.FM, SKY.FM, and

LZMA Utils (2005–2008)

This is the predecessor of XZ Utils data compression software. There are also benchmark results from 2005.

Tukaani pkgtools (2005–2007)

This was a fork of Slackware pkgtools with various improvements and new features. Screenshots are available too.

tukbuild (2005–2007)

tukbuild and its TukBuild files were a replacement for Slackware’s SlackBuild scripts.

Tukaani Linux distribution was why the Tukaani project name was created. Apart from what is above, there is no software to show from the distro days.