Chatting to users with limited rep
41186
Allow inviting people with rep < 20 to private chat?
57404
Propose a privilege to sit in the 500 reputation mark
29186
How do I contact other users?
127361
RFC: Better chat @mentions – A prototype
111591
Not enough reputation - wanting to answer/comment
127692
One comment per user per post but be able to reply to existing comments
93454
Asking user to contact you
30067
Chat related privileges are not site specific
153487
How should users start earning reputation?
39441
How do I invite a user to chat?
22991
A way for "new users" to ask about their post specifically
57307
System Users for Chat
49874
He who must not be named? (aka Anyone can ping everyone in chat)
78933
Roll out 10k tools gradually between 3k and 10k reputation for users who have shown interest in helping the site
157387
Getting feedback from anonymous users
44050
What is the best way to contact a moderator about a user?
30061
How should I add users non-interactively?