The about section of the release notes in Oracle Spacewalk 2.x Documentation indicate only minor branding changes and changes for GPG keys[18] Red Hat Satellite 5 is a licensed downstream adaption of Spacewalk with added functionality to manage Red Hat Enterprise Linux Subscriptions.
With the emergence of Red Hat Satellite 6 with based on a fundamentally different toolset, end of lifecycle phase of Red Hat Satellite 5 and the emergence of downstream spacewalk based offerings from Oracle and SUSE newer versions of Spacewalk may not have this close relationship.
In March 2011 Novell released SUSE Manager 1.2, based on Spacewalk 1.2 and supporting the management of both SUSE Linux Enterprise and Red Hat Enterprise Linux.
[19] In May 2018, during the openSUSE conference in Prague, it was announced[20][21] that a fork of Spacewalk, called Uyuni, was being created.
From version 4.0, SUSE Manager is based on Uyuni as its upstream project.