Taken from elm-starter-projects
This is a small collection of basic apps written in Elm. They're intended to be seeds for getting started with Elm, or exploring new concepts in the langauge. They're all intentionally a bit incomplete or simple to encourage additions and experimentation.
Each project has setup instructions, and some suggested next steps for adding new features, although feel free to disregard the suggestions altogether if you have creative ideas of your own!
Just a basic counter, with increment & decrement. This is a good place to start if you're totally new to Elm. The suggested next steps are a good path from adding to the basic Elm architecture to the beginnings of seeing how your code will be different if you haven't worked in a primarly functional language before.
This is a simple Journaling app. It has forms, (slightly broken) navigation, and interacts with local storage via ports. Try this out once you have basic familiarity with Elm if you're interested in building apps that work with textual or static data.
This isn't quite a game yet, but it could be. It uses subscriptions to listen to keyboard events and animation frames. Try this one if you're interested in building animated or highly interactive applications.