You can lock chests with my SignLock plugin. MCServer already has a ranking system integrated. No need to create a plugin for it. I think someone already made a home plugin, but I might be wrong about that.
What do you mean with an API for webinterface? Plugins can register a tab in it. Also why would you want an mobile app when you can just use your browser? The only reason I could think is that animations could make a website slow, but the webadmin doesn't have any animations (unless a plugin added it in his tabs).
What do you mean with an API for webinterface? Plugins can register a tab in it. Also why would you want an mobile app when you can just use your browser? The only reason I could think is that animations could make a website slow, but the webadmin doesn't have any animations (unless a plugin added it in his tabs).