Is there a way to follow people's activity?
64886
Is it possible to follow a user automatically?
3666
Show OPs if someone is answering, live
158722
how to verify users are in group
142506
People will finish updating when Photos is in the background
137418
How can I gear my follower post 2.0?
48736
How can I find out if the current user is in a specific group?
41118
How to monitor who is pinging me?
16664
Drawing users' attention to unrecoverable actions?
79610
'Followers' and efficiency
66738
Track next Socratic badge progress
6116
View approximate number of users online
80836
How to follow someone else's Stack Exchange (questions) filter
3139
Privacy: Record activity ON?
37434
Monitor keywords from my Twitter contacts
138748
Trackable links to my app in the App Store
85756
How to find users by name
136460
Best way to detect when a user leaves a web page?