When you are creating a new post using Ecency app there is a drop-down arrow at the top next to the word Blog and when you click it you can see all the communities that you can post to.
Ecency app has been translated into 28 different languages and will be great boost for helping new users come to Hive.
When creating a post using Ecency app the gear icon at the top left allows you to set beneficiaries and give a portion of your rewards to the community or people that you want to support. Helping your favorite communities grow will benefit all the members of the community.