openSuse changed the software management tools every time the last two releases. The upcoming release 10.3 will see another change: zmd will vanish.
According to Andreas Jaeger zmd will be dropped because it will be developed for the enterprise versions only – openSuse software management will be left to libzypp and Yast itself:
openSUSE is focusing on native software management by using YaST and
libzypp, the package management library.
ZENworks Linux Management is Novell’s solution for enterprise-class
resource management for desktops and servers. ZENworks components are
fully available and supported for SUSE Linux Enterprise based products
and not longer part of the openSUSE distribution.
From my perspective this is not as bad as it sounds since the software management on openSuse was a bit unclear (but brought me many readers 😉 ). This move to drop zmd will leave openSuse with Yast/zypp alone and will therefore concentrate on one single solution – an attempt which totally makes sense because it will help the user.
But of course you can still use apt or yum if you prefer: they all use the same repository format, so no problems there.
Keep in mind that this news is about a still in development distribution – it might change again.