Here we provide source code of original GPL licenced programs developed by Zenwalk and third party packages.

Source code for packages included in the Zenwalk Linux distribution, which are neither developed nor modified in the Zenwalk distribution packaging process, are also available from their own upstream project source code hoster. 

For example, in the case of unmodified Slackware packages redistributed by Zenwalk: their source code is avalaible from slackware.org.

According to the GPL, only "original" GPL code "developed by Zenwalk", or third-party GPL code which has been "modified" by Zenwalk : have to be hosted and made available to the end user by the Zenwalk Linux distribution.