Here’s an example of a simple IRC bot using Cinch:

require ‘cinch’

bot = Cinch::Bot.new do
configure do |c|
c.server = “irc.freenode.org”
c.channels = [“#cinch-bots”]
end

on :message, “hello” do |m|
m.reply “Hello, #{m.user.nick}”
end
end

bot.start

Just install using:

gem install cinch

https://github.com/cinchrb/cinch#readme

Getting Started (in Markdown): https://github.com/cinchrb/cinch/blob/master/docs/getting_started.md

and the docs: http://rubydoc.info/gems/cinch/frames

Other IRC Bot frameworks: https://www.ruby-toolbox.com/categories/irc_bots