I need a tool to follow, mute (block), or unfollow multiple accounts at the same time. Thus I develop this tool.
For example, you can use this tool to follow all your fans back (who follow you). Of course, you can also get a list of someone's following or followers, and then decide to follow, mute or unfollow them.
Currently, there are five pre-define list:
You don't need posting key to retrieve the list of followers/following. However, you do need Private Posting Key (which only stays in the browser, in the current page) to broadcast the transactions (five in a block).
I hope this helps!
Also: you can vote me at the tool I made: https://steemyy.com/witness-voting/?witness=justyy