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.

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.

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.

WeChatExtension-ForMac is an unofficial plugin that enhances the WeChat desktop experience on macOS by adding new features such as message anti-recall, multi-instance login, auto-reply, and UI customization. Designed for users who want more control and functionality from their desktop WeChat client, this plugin requires patching the app and may violate WeChat’s terms of service.

WeChatPlugin-MacOS is an unofficial plugin for the macOS version of WeChat, providing features like auto-reply, message anti-recall, and remote control. It injects custom functionality into the official WeChat client using macOS’s dynamic library loading, offering power-user features not present in the native app. This project has been widely used but is no longer actively maintained due to security and compatibility concerns.

LimeChat is an IRC client written on RubyCocoa.

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.

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

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.

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.

Jabber (www.jabber.org) client for Mac OS X.

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.

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.

OpenSource Mac OS X project to create simple Application that will communicate via AppleScript and Cocoa with Macintosh applications and iChat A/V 2.0. It is in Brazilian Portuguese and English.

Asynchronous networking framework for GNUstep and Mac OS X. Has built-in support for line-based protocols, IRC, and raw TCP/IP streams.

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.

Chat Messaging App Light and Dark Theme is a Flutter UI project for building a messaging app interface with both light and dark modes. It includes multiple screens that cover the core visual flow of a chat application, starting with a welcome screen and moving into authentication and conversation views. The project is intended as a design and implementation reference rather than a complete messaging backend. It demonstrates how Flutter layouts can be structured for chat lists, message screens, onboarding, sign-in, and sign-up experiences. The dual theme support makes it useful for learning how to design consistent interfaces across different visual modes. It is best suited for Flutter learners and mobile developers who need a clean UI base for chat-style apps.

Crikey! is a Cocoa IRC Client for Mac OS X