When installing is opensuse something you can chose, or is are you pretty dependent on whatever package is with the distro? Of course, there is the command line too.
In the distro I'm using, Linux Lite, there is a repository that looks tailored to that distro but has a limited number of packages. There is also the synaptic. I was using Peppermint OS as the distro which used the software manager same as Linux Mint, but decided to go with Linux Lite as the interface I think is more friendly for linux noobs
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I was playing around today with appimage. Plus, there is the command line.