Open Source ICQ Software

Miranda IM is an open source, multi-protocol instant messaging client designed to be very light on system resources, extremely fast and customizable. A powerful plugin-based architecture make Miranda IM one of the most flexible clients on the planet.

Miranda NG is a successor of a popular multi-protocol instant messaging client for Windows, Miranda IM. Very light on system resources and extremely fast. Supports Em-LAN Facebook, Gadu-Gadu, ICQ / MRA, IRC Internet Relay Chat, Jabber XMPP, MinecraftDynmap, Omegle, Sametime, SkypeWeb, Steam, Tox, Twitter, and VKontakte. Linux is not a natively supported operating system, but Miranda is known to run on Linux under Wine. PluginUpdater is responsible for keeping your Miranda up-to-date. It checks for updates for all installed plugins and other components like icon sets and langpack regularly (depending on its settings) and performs updating automatically.

Bot Sentry is a Pidgin (libpurple) plugin to prevent Instant Message (IM) spam. It allows you to ignore IMs unless the sender is in your Buddy List, the sender is in your Allow List, or the sender correctly answers a question you have predefined.

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.

Jimm is an ICQ clone for mobile devices, such as celluluar phones. It is written in Java 2 Micro Edition (MIDP) and uses protocol version 8. Jimm is not affiliated with or endorsed by ICQ, Inc.

Licq is an ICQ/AIM clone written fully in C++. It uses an extensive plugin system to manage many different functions including the MSN protocol. The main GUI is written using the Qt widget set.

A miniature console based AIM client written in pure Java. It implements the TOC protocol and provides a solid framework for understanding and writing your own IM clients or bots.

A pidgin plugin that allows user to assign global hotkeys (e.g. Ctrl+Alt+g) for togglling buddy list and reading queued message. When "Toggle List" hotkey is enabled, it makes the buddy list hidden from your taskbar and task switcher (similar to ICQ).

A free Win32 instant messaging client. Smaller, Faster, Easier.

YSM is a simple ICQ client based on the v7/v8 icq protocol version. Free of external libraries requirements, written in the C Language.

PHP2ICQ is a libary which lets you easily send ICQ Messages from your own php scripts by using a direct connection to the ICQ server via the Oscar protocol (ICQ v7/v8/v9). It is completely written from scratch.

There are many people, who search server that support several protos and can work as corporate internet connection-independent ICQ gate.

climm is a portable, small, yet powerful console based, fully internationalized instant messaging client supporting the current v8 ICQ protocol and XMPP.

ICQMail is ICQ->Email gateway daemon

Jarl is a Perl/Tk Client. It strives to provide full functionality with every aspect of the Jabber IM system. It currently supoprts messaging, chat, groupchat, ICQ, AIM, and IRC support.

icqlib is the most feature complete, open source, library implementation of Mirabilis' ICQ protocol available on the Internet. icqlib currently supports approximately 90% of the ICQ UDP v5 protocol and 80% of the ICQ TCP v2 protocol.

The Perl Support Center (PSC) is a internet online web based support desk with client manager. 4 levels of logins, Admin, Staff, Reseller, and Member. Many features like eMail all users, Tech stats, staff management, FULL client management and more!

An example of a powerful Icq client that has many useful features and can be used as a right replacement of a standard client. MultiLanguage. Doesn't use any common icq-protocol components. FIXED NOW! See rel_0.86.5 for components.

Gaim for Qtopia is an official port of the multi-protocol instant messenger client Gaim for the Zaurus and other PDAs running Qtopia. It supports AIM, ICQ, MSN, Yahoo!, IRC, Jabber, Gadu-Gadu, and Napster.

GnomeICU (previously GtkICQ) is an Internet-based communications program which makes use of the ICQ protocol and GNOME. DISCONTINUED: We recommend you use Empathy

ICQ ActiveX Control allows you to communicate with ICQ server and other ICQ users around the world, thru an easy to use interface. The control was aimed to be used effortlessly by developers around the globe.Feature include: . Register new user & Passwor

This program includes a gui interface and protocol(s) written in Java to be used as a chat program. The primary chat protocol is MSN, but the program is expanable with "plug-ins" that allow other protocols to be added such as Yahoo!, AIM, and the like.

A application to securely communicate with other users through the internet or through modem! This application is in its Beta stage and is currently only running under Windows 98 / 2000 and up. It will in the future be compatible with linux and BSD.

Due to GNU-TLS is pretty much up to the task now. This project has been stopped. It is a patch for GAIM to suport OpenSSL. Binary is for Slackware 9.1 and depends on OpenSSL >= 0.9.7c, and gtkspell >= 2.0.4

PlanetaMessenger.org is a Instant Messenger with support to all well known instant messenger networks including ICQ,MSN,AIM,Yahoo! and Jabber through a powerfull plugin engine. PlanetaMessenger.org support multiples look and feels, plugins and profiles.