Aetherlight

Aetherlight adds mobs called automatons that players can fight, alongside an aethermeter and a group of technology items such as the reticulated spline, the accelerating apparatus and the gyrosphere. The aethermeter depends on a crafting recipe, and the mod notes that its healing needs work so it does not rely on the player eating other items. Installation needs Fabric on a client and on a server, because the environment is client and server. Source code is published, and the code is released under CC0 1.0 Universal, so the mod is open source.

The latest Fabric file is 0.0.1 for 1.21.8, published on 2026-05-30 on the alpha channel. The mod is also a long-running project by its author, Joshua-Cogkeep, who continues to rework its items and mobs before it reaches a stable release.