We have an IRC server.

Details

Instead of reading what follows, you might just be able to click here, and use the magic of the IRC URL scheme.

Server
irc.tf
Port
6697. Note that SSL is mandatory, even though some people think it's pointless. Our certificate is provided by Let's Encrypt.
Server password
You need to supply a server password in order to connect. Please get in touch and I'll send you one the same day.
Channel
Most people lurk in # to chat. It acts as the lobby.

Elsewhere

Clients

To connect, you will need to obtain an IRC client for your computer.

For Linux, try
irssi, HexChat, WeeChat.
For Windows, try
HexChat.
For Mac, try
Colloquy, Textual, XChat Azure.
For iOS, try
Colloquy, Igloo, Mutter, Palavar.

Then, set up a new connection as described above.

If there is sufficient interest, irc.tf will offer its users ZNC bouncers.