IRC - The IRC channel not very active anymore, as the developers have moved on to using Gitter for live discussions; nevertheless, the channel is still open. There are many free IRC clients: XChat (for Linux),
HexChat,
IceChat amongst others. You can also use
Web Chat to connect to IRC via your web browser, which may also be useful when you're behind a firewall that blocks the IRC port. The IRC channel logs are archived and made
available on the MantisBT web site.