Noxesium

On a server that runs Noxesium, the server can create custom interactables on the client, such as speed boosters or jump pads. It can move authority over riptide tridents, elytras and lunge spears to the client so they behave the same regardless of ping, and keep arrow behavior or note block and tripwire updates on the server alone. Sounds can be played with a start offset, a volume that changes over time, and resumable playback.

The mod also covers interface and input control: it can draw player heads and text with offsets, lock camera movement, restrict GUI rescaling and debug features, hide the UI through F1, adjust entity hitboxes, change beacon beam heights and change the field of view. Server developers can reach these features through code or in-game commands with the server API plugin for Paper. Noxesium integrates with MCC Island, which detects players running the mod and sends extra location and game state information to other mods.

Client-side only means the server does not need the mod for its functions to be used by players who install it. It is published for Fabric and covers 1.19 – 26.3 with 29 release versions, and the latest file is 3.3.0 for 26.3. The code is open source under the GNU Lesser General Public License v3.0 only.