Here are some plugins that are known to be used on the server.
The plugin that every server has. Adds useful commands such as /tpa, /msg, /back, etc.
A plugin for the plot system. It's the successor of PlotMe.
A plugin to edit your world easily. You have known this already. See WorldEdit
A plugin to listen to votes, so you can get a reward for voting.
This is a paid plugin. It adds new custom items to the game, like lightsabers, guitars, clocks, etc. The mod also adds corpses for killed people.
This is a paid plugin. As you except, it adds vehicles, like cars, bikes, submarines, tanks, planes, helicopter, and even a broom.
A plugin for blocking spawning specific items and items with NBT data.
A plugin for elevators. One example is on the /spawn, where you can stand on the end stone and either jump to go up a floor or shift to go down a floor.
This is a paid plugin, or at least the latest version. It's purpose is for mob disguise. You can be a mob with the command /disguise.
Armor Stand Tools
A plugin to create a custom armor stand. Type "/astools" to use it.
This is a paid plugin. A plugin for mini games.
This is a paid plugin. A plugin also for mini games.
This is a paid plugin. A plugin for custom enchantments.
A plugin for creating NPCs.
A plugin for prefixes.
A plugin for creating player statues. (/statue)
A plugin for the coin flip/coin toss challenge. (/cointoss)
An API for easy hooks for plugins. A dependency plugin.
Library to enables read and write access to Minecraft protocol. A dependency plugin.
* Legacy plugin. The plugins stopped working due to the 1.13 update or removed completely.