AutoFlood periodically sends a single-line message in a chat channel. It's designed for advertisement for guild recruitment, crafting, in-game events...
/flood [on|off]: Start / stops sending the message./floodmsg <message>: Sets the message. Supports hyperlinks to items, spells, crafts, achievements.../floodchan <channel>: Sets the channel. Accepted values : say, guild, raid, party, bg and channel number/floodrate <duration>: Sets the period (in seconds), minimum 10/floodinfo: Displays the message and the parameters./floodhelp: Displays this help message.
The settings are saved per character/realm.