Hello Aternos, employes, and anyone else who happens to be reading this.
I am here to say that for one of the mods that is currently able to be installed you are missing 2 mods it requires.
The mod you may ask is AcademyCraft. The mods missing are LambdaLib Found here https://minecraft.curseforge.com/projects/lambdalib and MineTweaker3 found here https://minecraft.curseforge.com/projects/minetweaker3/files.
I only found this out because
A) Not being able to find ethier through the mods search
and
B) My server not launching (errors)
I know u ask for a short description of the mods but u already have AcademyCraft listed on your mods page but you don't have these mods that it requires. So I feel as though I should not have to write a short explanation on these. I feel this because this to be honest is a mistake on your part by not adding mods required by AcademyCraft. I have looked and doubled checked to ensure that I was correct that you did not include the 2 required mods that are MineTweaker3 and LambdaLib
So Aternos please fix this you added the mod (again AcademyCraft) but not what the mod depends (Minetweaker3 and Lambdalib) on and needs for not only the mod to work but the server to as well!