Open Source Objective C Chat Software

Adium is an Open Source, multi-protocol instant messaging application for Mac OS X. Adium supports AIM, ICQ, Jabber, MSN, Yahoo!, Google Talk, Bonjour, Gadu-Gadu, Novell Groupwise, SIP/SIMPLE (Text), and Lotus Sametime. Additionally, it supports all of these applications at once so, even if you have multiple IM accounts, you don't have to log into each account separately.

Project Libre is an open platform for chat bots, virtual agents, live chat, and more. It includes web and mobile services for Java, Android, iOS, and JavaScript. Project Libre includes an API, SDK, and user interface for live chat, chatrooms, forums, chat bots, virtual agents, and other services supported by the Bot Libre and Paphus servers. The hosted servers include: BOT libre! - http://www.botlibre.com - free chat bot creation and hosting platform FORUMs libre! - http://www.forumslibre.com - free embeddable forums LIVE CHAT libre! - http://www.livechatlibre.com - free live chat and chatrooms Paphus Live Chat - http://www.paphuslivechat.com - commercial live chat, chatroom, forums, and chat bot hosting service Also hosted on GitHub, https://github.com/paphus/Project-Libre

X-Chat Aqua is X-Chat with an Aqua interface for MacOS X. X-Chat Aqua uses the irc engine from X-Chat, and is designed to look and feel like the GTK+ front end.

Fire is a multi-protocol instant messenger client for Mac OS X based on freely available libraries for each service. Currently Fire handles AOL Instant Messenger®, ICQ®, MSN® Messenger, Jabber, limited IRC, Yahoo!®, and Apple Bonjour communications.

LimeChat is an IRC client written on RubyCocoa.

MChat is easy to use IRC app for the #macintosh channel on freenode.net. It is a easy to use single server and single channel irc program. MChat was designed to be a extremely simple program for beginners to learn how to use IRCl

This project was founded to make a HIG-compliant, easy to use and visually stunning IRC client for Mac OS X.

Volley is a client/server system similar to Hotline, but using a plugin design that makes it more extensible. Server plugins define services such as chat and file sharing. Client plugins allow users to interact with each other using those services.

A Yahoo! Chat client for use of Yahoo! chat without a web browser and slow Java applet. Cocoa through and through with features improving constantly.

Proteus is a multi service instant messaging application for Mac OSX. At the core of Proteus is this Service Controller! This controller provides a common interface for any number of applications to plug into. Each application that knows how to commun

Smiley is a small application that makes it easy to add new emoticons to iChat and iChat AV applications. With Smiley, you can add prebuilt emoticon packs or create your own images and add them easily and quickly.

Spychat is an easy chatting client for Spymac and Spymac News Network. Users can come and chat with friends as an alternative to the somewhat annoying shoutout box. With a determined team behind Spychat, we are improving everyday.

Utility for extracting, indexing, searching, archiving, viewing, and exporting iChat transcripts. Turns thousands of individual unsearchable binary iChat files into an sqlite database and a .tar.gz file.

iChatExporter extends functionality in iChat so you can export any real-time or saved chat conversation into a text file. This is a feature of most modern AIM clients that is sorely missing in iChat.

APM(All Platform Messenger) Is a Web Messenger Useing php/MySQL storage for quick and easy Messaging once Pre-Alfa has been competed the steps in the OS'es will begin This system is its own not working with other systems

This project will work on developing ad hoc network capabilities for Apple's iPod Touch and iPhone with goals of developing a chat program.

Instant messenger client for GNUstep. Using Björn Giesler's port of the AddressBook framework, Angelos accesses the user's addressbook to produce a buddylist with real names and photos.

A project to make a clean, efficient IRC client for Mac OS X in Cocoa.

Azonto is a Cross-Platform Mobile Messaging Application that allows users to share images, songs, videos, create and add each other to groups. It is for the trendy who wants to be on top of the mobile messaging game.

BlastServ is a plugin used with XChat and Mac OS X. It will be an IRC File Server (FServ or FServe), similar to SysReset for Windows or Obsidian. Fservs send files over DCC, and have an interface like FTP. They are a quick and easy way to transfer files.

BoomBot is a developer's framework for writing a bot connecting to the AIM network. It manages the network communication for the bots so that they can be easily written without worrying about AIM itself at all. Bots can be written in Objective-C or Lua.

ChatSecure is a free and open source messaging app that features OMEMO encryption and OTR encryption over XMPP. You can connect to your existing Google accounts or create new accounts on public XMPP servers (including via Tor), or even connect to your own server for extra security. Unlike other apps that keep you stuck in their walled garden, ChatSecure is fully interoperable with other clients that support OMEMO or OTR and XMPP, such as Conversations (Android), CoyIM (Desktop), and more. ChatSecure only uses well-known open-source cryptographic libraries to keep your conversations private. Other apps may make claims about "military grade" security but, without publicly auditable source code and verifiable end-to-end encryption, you cannot be truly safe.

Traditionally, IRC clients on the Mac have been anything but glamorous. Colloquy is an advanced IRC client which aims to fill this void. By adhering to Mac OS X interface conventions, Colloquy has the look and feel of a quality Mac application.

Crikey! is a Cocoa IRC Client for Mac OS X

dcosx is a Direct Connect client based on dclib. It takes full advantage of Mac OS X's Cocoa environment, so we x'rs don't have to trudge through QT.