From Koha Wiki
IRC is like an open chat room where you can drop in to see what's going on, ask questions, or participate in regular community meetings.
You'll want to do a few things:
- Choose a client/program to use for IRC - there are many out there (irc.oftc.net:6667), or you can connect directly via the web interface here: https://webchat.oftc.net/?channels=koha
- Choose a nickname - here is a list of users and their nicknames: https://wiki.koha-community.org/wiki/IRC_Regulars (Don't let the term 'regular' scare you, anyone who is going to drop in to the channel should add their names here so you can find nearby users or just let us know who you are)
- Drop in at different times. The project is truly international, you will quickly find that there are 'busy' times for various parts of the world. If you want to talk to someone in New Zealand or America you will find they are around at vastly different hours :-)
- Don't be discouraged - every volunteer on the project, even those who work for support companies have work outside of IRC and may not be able to answer - if you don't get an answer in chat the lists are a good backup.
- Come back often - the more you are in channel the more questions you will be able to answer and the more people you will get to know
Example clients (please add any you recommend):
- Hexchat - https://hexchat.github.io/
- Colloquy - http://colloquy.info/
- Quassel - http://quassel-irc.org/
- Pidgin - https://pidgin.im/
- Wikipedia list/comparison - https://en.wikipedia.org/wiki/Comparison_of_Internet_Relay_Chat_clients