A great spotlight by SeriousCreeper:
Aetherworks is an addon to Embers by Elucent that adds aetherium and powerful tools made out of it. But frstly the mod is about aetherium collecting and refining. Mine aetherium ore, build multiblocks and create new awesome tools on the mighty Forge! Aetherworks is meant to provide a late-game toolset for Embers. The github page contains a detailed wiki with a step-by-step guide so make sure to check it out!
JEI support included.