http://steemreports.com/sincerity-most-used-apps/
I have added an extra column showing the number of accounts using each of the Steem apps in the last 7 days.
I was surprised by the impressive number of accounts using esteem, and I guess that since the dmania memes site has now shutdown, that app will disappear from the list soon.
This data has also been added to the corresponding Sincerity API:
https://multi.tube/s/api/most-used-apps/