Libnonymous is a minecraft library mod for all of davenonymous's mods.
It is required by e.g. Bonsai Trees 2 and Compact Machines 4.
It is also able to show a universal config GUI for any mod using ForgeConfigSpecs.
I might remove this feature once Forge has reimplemented theirs.
Simply entering /libnonymous config opens a GUI where all compatible mod configs are listed.