The `/editsign` command lets you edit each line of a sign, including adding RGB colours to your signs. It even lets you tab-complete the existing content for quick editing!
EssentialsX's warp system lets servers create warp points for anyone to teleport to. One of many utility commands, /warpinfo lets you see where warps lead to!
EssentialsX's Discord addon lets you bridge between in-game chat and chat channels on your Discord server!
With EssentialsX Discord, you can also allow your players to send private messages to players from Discord, without needing to log into the server.
EssentialsX Discord even allows admins to run console commands straight from Discord! Not only that, but command responses are wrapped up neatly in a private command response, so you can run server commands without interrupting an ongoing conversation.

The essential plugin suite for Paper and Spigot servers.