I am a very new user. Very new. Out of everything I have learned and produced over the last few days, I would have to say the best app is esteem. I learned a little about SteemMonsters, Partiko, Utopian, and a few others. But overall, esteem actually gives me the power and features I require to build and maintain a community where steemit itself has fallen short.
I don't like to see a lot of apps that do the exact same thing, but I'd say apps that provide a service or benefit that really provides the community the facility to do something great is what I'm looking for. Such as simple benefits like scheduling a draft to publish, or saving a post as a draft for that matter.
Welcome to eSteem! Be sure and ask if you need any help. It sounds like you are off to a good start!