Our channels are located on the Freenode network, chat.freenode.net:
There's a groupchat kept up by the Groupbot. To be invited there, add 56A1ADE4B65B86BCD51CC73E2CD4E542179F47959FE3E0E21B4B0ACDADE51855D34D34D37CB5 to your contact list and send “invite” to the bot.
If you want to run your own groupbot, consider using ToxBot.
You can follow us on Twitter @ProjectTox.
We have a subreddit: /r/ProjectTox.
We have Development, Support, General and other mailing lists at https://lists.tox.chat.