Bukkit

2.1.0 (Apr. 24) Changed the way the connection to IRC is done, meaning a few new features are available

• SSL support - must be turned on in the configuration.
• %reason% variable available in the IRC part formatting line
• Removed show_user_prefixes from the configuration. There are too many problems with it at the moment.
• Able to reload the connection configuration while the plugin is loaded.
• A useful (but still simple) API to receive and send IRC messages has been added. See this for more details.

2.0.6 (Apr. 22) - Do not use if you've had problems with using 2.0.5.

• Fixed !players command not showing names with colors correctly
• The message queue is cleared before reconnecting which prevents flooding the channel with old messages
• New configuration option: connection.bot_message_delay

2.0.5 (Apr. 14)

• Fixed nick prefixes displaying incorrectly or not displaying at all when connecting to certain IRC servers (Tested on a server using Unreal which has modes q , a &, h %)

2.0.4 (Apr. 12)

• Fixes server message formatting issues
• Will hopefully be the last update to this for a while. Hopefully.

2.0.3 (Apr. 12)

• No bug fixes. It's not necessary to upgrade from 2.0.2 but it is recommended to upgrade from any older versions.
• Able to show nick prefixes (@, +) when sending a line to Minecraft
  • May be turned on or off in the configuration: settings.show_nick_prefixes

This is known to work on IRC servers running bircd, charybdis and Unreal. Other servers have not been tested.