Naming isolated packages does the ecosystem disregard because things julia-magically work together and therefore packages do not only add to the ecosystem but multiply.
Prime example ForwardDiff which makes everything else nicer. You model a trebuchet with RigidBodyDynamics on one day and find the optimal proportions on the next day with ForwardDiff. I still owe you to do that actually, so in the meantime I just have the example of a simple Kalman filter which suddenly can be fitted to data because we have automatic differentiation and did I say that it is the fasted filter in the world too because of StaticArrays?