ownCloud - paid today. Free version is, but idea of ownCloud is different. Installation is different. Administration is different. All worse for our targets then Syncthing of course. We have no IT engineer and don’t want. We are divide IT between us. We don’t want be “master of blade” for cut a bred.
GitHub - we have… Our Automation engineer have it for his programs - based on GitBucket. (This is I am, by the way)) ) For others it not useful at all. All those push-pull-tree-merge-comment and so on features not for business at all. Hg (Mercurial) maybe… less numbers of commands, can be decentralized… but the same points - nobody will “push the button”. It should be automatic on background.
SharePoint - “kill me” product for our objectives. It’s rule in corporations (maybe and apologize) - in small company or team it not useful. Better use Bitrix24 if you need a combine.
I am happy with Syncthing, but just spend time for folder manage. Just ask about not so big addition. Maybe it can be plugin or extension… It’s just visualizing of what already in Syncthing. Table with rights.
You know not so lot of soft are useful in small teams. Especially in Engineers (in common, not only IT) community. IT engineers organized and write products only for their needs. I can call only few of products that are useful… Pilot-ICE one of them. It’s do not so lot, but cost a lot. In this area “more or less” soft cost a lot. Normal functionality soft cost a lot more. But teams have no such money or even don’t ready pay in startup period at all and in the same time have no such lot of needs as big companies. Other words it’s free field for soft writers. Syncthing are partly on this field. For me is’t looking good even without folder management but I want and need it. And know that I am not alone in it.