I would like to request AdditionsPlus, It is a Spigot plugin, which adds a lot.
This plugin adds custom commands, a score board, menus, name tags, and more. It even goes along and improves other servers!
The website makes it easy to understand with videos and examples. This plugin can add a lot to anyones server.
The one downside I see is that it does cost 6 euros. Which perhaps isn't so good. However, all good things have a price. And 6 euros is not a big one.
I do however understand if you are unable to get it...