Latch is an extensive container and entity locking plugin for Sponge that is still a work in progress, but is getting better and better everyday. We have a lot configurability for each lock and more is being added often as well as some nice administration commands. If you need any information visit our page on Ore or come on to our Discord and someone should be able to help you. If you have any suggestions please mention them here on Github or on our Ore page. I hope you enjoy our plugin!