DemoDev

DeluxeSurvival adds Survival-like commands into your server.

PlayerEdit allows you to edit your username, skin, and more.

EventBundler adds 110 new events for plugins, and is able to be used on 1.12-1.21+

Reworked TPA is a simple and lightweight tpa plugin/mod for Minecraft servers

A better Entity / Player API mod for Fabric.

Via Control is a Via Version add-on that allows you to choose what client versions (like 1.20-1.21.11) into your server.

Sponge For Bukkit is a plugin that allows you to use some sponge plugins in bukkit

Mod List allows you to do /mods and shows the installed mods on your server/client.

A Minecraft challenge mod for survival servers and singeplayer.

Sponged API is a plugin that allows sponge plugins on regular plugin loaders.

Fabric.SK is a Fabric version of the Skript plugin for Minecraft.

Ultra Hardcore+ (UHC+) Hardcore Deluxe add-on that adds a lot of new features to Minecraft Hardcore.

A simple Dimension Control mod for Fabric.

A simple plugin that allows you to use Teleportation commands (TPA, Warp, etc.)

HardcoreAbilities is a UHC+ and Hardcore Deluxe add-on that adds more abilities.