F2PAddon
From Polar Lights Wiki
F2PAddon can be downloaded from curse.com.
Its features include:
- Chat between all users of the addon on the same server.
- Forming groups with other Starter Edition players, by way of requesting invites from channel users with full accounts.
- Sharing player's character data, and building up a database of all the players who your addon has seen in the chat channel, in order to provide tooltips showing who a player's alts are.
How chat channels work without F2PAddon:
In this example we have a Starter Edition account, and two Subscribed Accounts. The Starter Edition account is unable to send chat messages to the WoW server, but it can see the chat messages from the Subscribed Accounts.