Apologies for the clickbait-y title, but my co-founder and I did find that most of these facts were little known when we were talking to our users recently!
This developed out of sunboxlabs & gridlesskits – and is the "version 3.0" update with a major new direction based on user feedback (retention rate was low previously...). I'm already addicted myself. Heavily inspired by coinspectator.com.