Open Source Windows 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.

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.

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

Kraken is a continuation of the Openfire IM Gateway plugin, but in a way that works for any XMPP server. It provides a way for XMPP users to log into, and communicate through, their legacy IM accounts such as AIM, ICQ, MSN, Yahoo, and friends.

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

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

Plugin for Pidgin messenger that saves your opened conversations at shutdown and restores its at startup.

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

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 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.

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.

ptyaim is a simple curses client for AOL Instant Messenger, ICQ, and IRC. It runs on many Unix-like systems, and Win32.

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.

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.

Babel IM is a skinnable instant messenger, with plugins for ICQ, AIM, MSN, Yahoo & RSA crypto. All functionality is provided through the plugin interface, so Babel is highly customizeable.

Instant Messenger provides user with an easy way to chat with friends from many popular networks in one integrated program. Supported IM networks are ICQ, AOL, Google Talk, Facebook, MSN, IRC, Skype, Gagu-gadu a many more. It is based on great Pidgin Instant Messenger project.

Boltun is a chat bot plugin for Miranda IM with its own engine.

Provide a secure and centrally managed Business Instant Messaging Solution (server/client), including Chat, Voice / Video Conferencing, File Transfer, Emoticons, Dictionary and Tools add-in function etc.

This program serves as a link between two or more chat networks, allowing users on one network to communicate with users on another network. For example, you can be logged onto Battle.net and be talking to people on IRC and people on AIM at the same tim

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

The goal of CryptoJIM project is to create a cross platform instant messenger with support for a central encrypted message archive, transparent message encryption and several IM Protocols. At first priority it will support the ICQ Protocol.