I'll work on this MOD, which was requested in the MODdings Most Wanted (Round 2).
Fountain of Apples wrote: A standard phpBB installation provides a way for a user to reset their password if they have forgotten what it is. It requires the user to enter their username and their email address, then sends them a new password. This is all fine as long as the user remembers their username. Sometimes they forget.
This MOD should add a function that allows a user to retrieve a forgotten username. It could present a form that requires the user to enter their email address (which is the only thing they may know at this point) and request a Username Reminder email. The email should only be sent to the email address specified, and only if the user account is currently valid and active.
The MOD could include an optional "Flood Control" that limits how many reminder emails can be sent to a specific email address, or even from the board in general. This would be done to prevent someone from bogging down the server by requesting a username reminder for the same user over and over, or by requesting a username reminder for every single user on the board.
I'll keep you updated about my progresses