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.

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.

Ayttm is an instant messenger program, supporting various protocols such as MSN, Yahoo, AIM, Jabber, and more. It is the heir of the Everybuddy project, and aims to continue improving the program and addressing its shortcomings.

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.

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.

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

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 “Miranda IM” plugin that adds support for exporting every message, URL or File you receive to a text file. Messages are exported to one file per user. New messages are exported when you receive them. Can be used as history management.

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

This is an Artificial Intelligent response program using Eliza designed to use with the Autoreply 1.0 or higher plugin for LICQ. Let people think they are actually talking to you.

IMGIANT is a GTK based instant messenger application. It will support 8 different protocols, (aim, yahoo, icq, msn, napster, jabber, gadu, groupwise) and contain all features that an Instant messenger should contain, including more it shouldnt!

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).

This is a Jabber Instant Messenger written in Visual Basic 6. This project is dead.

Dnipro IM - new ICQ client. Writting on Delphi. Very easy, but I want to make The Really Good IM. So, connecting to me, connecting to Dnipro!

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

Multiprotocol plugin-based instant messenger for X11 (optionaly support KDE), Windows and MaxOS X.

Multiprotocol plugin-based instant messenger for X11 (optionaly support KDE), Windows and MaxOS X.

ICQ clone born to satisfy my needs. It runs as well on a 486 with win95, on a single diskette, so it's fast and small.

The RISC OS ICQ client.

Configurable and extendable Icq client written in Tcl/Tk. Supports ICQv8 (OSCAR) protocol.

Anastacia Messenger is a multi protocol instant messenger, currently supporting ICQ, MSN and Yahoo. Written in Java, it offers a solution for people working with different operating systems, giving them the chance to use the same messenger/gui anywhere.