I have brought this up before but unofficially. I think that a chest sorting plugin would be a great addition to our server. I myself struggle with messy, cluttered chests. I've played on other servers with these plugins and to me they are definitely helpful. I'm sure others can relate to the struggle. Post a vote if you'd like.
Here is a link that I found to an example. No idea if this one would work, but it's an example