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Who’s Online 1.6

Official! This product is maintained by the Vanilla Forums staff and core team.
Adds a list of users currently browsing your site to the sidebar.

This plugin creates a list of users that are currently online. It uses Javascript to refresh the list at a set interval to maintain accuracy. There is an admin panel that will allow you to change whether the panel is global or just targeting discussion pages. It also allows you to set the frequency. If you have a busy forum you are encouraged to increase the frequency.

Hat tip to Gary Mardell for this addon, which is now maintained by Vanilla officially.