Discord server

Discord software homepage:https://discord.com/
Channel #tomenet - invite link: https://discord.gg/QGJw7fT

IRC server

For IRC clients, eg mIRC (Windows), Hexchat (multi platform), irssi (POSIX):
Channel #tomenet on libera.chat

Or directly connect here in your web browser:
https://web.libera.chat/?channels=#tomenet
You can change the predefined random 'guest' nick name to anything of your choice provided it's not already reserved by someone else, then click 'Start'.