Official site: http://elm-lang.org/

Online package repository: http://package.elm-lang.org/

please-focus (package for writing lenses): http://package.elm-lang.org/packages/SwiftsNamesake/please-focus/latest

json-extra (for working with json): http://package.elm-lang.org/packages/elm-community/json-extra/latest

elm-decode-pipeline (another library for decoding json): http://package.elm-lang.org/packages/NoRedInk/elm-decode-pipeline/latest