lets you view Twitter as someone else, with all the Tweets from the people he/she follows. For example you can enter Oprah and see her Twitter stream the way she sees it.
"Followerwonk helps you explore and grow your social graph.
Dig deeper into Twitter analytics: Who are your followers? Where are they located? When do they tweet?"
"Welcome to fllwrs, the Twitter follower tracker. Would you like to see a record of who follows and unfollows you every day?
Would you like to get notified when someone unfollows you?
Use fllwrs to monitor changes in your Twitter followers over time and keep a history of followers that have been lost or added."
"Read Twitter threads with ease
Thread Reader helps you unroll a full Twitter thread on a dedicated beautifully designed page to allow an easy read of the whole story."