I nod my head to every one listed so far. This community is great and there are a lot of great minds at work here. Instead of repeating what everyone else has said before, I would like to give a toast to the - in my mind - best package authors in our community:
@mdgriffith for mdgriffith/elm-ui.
@avh4 for avh4/elm-color.
@arowM for arowM/elm-form-decoder
@turboMaCk for turboMaCk/any-dict, turboMaCk/any-set and turboMaCk/queue
@ianmackenzie for ianmackenzie/elm-geometry and ianmackenzie/elm-geometry-svg
And for the best package of them all