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KINEC Is Not Encrypted Chat is a client/server chat program designed to keep you secure. It uses strong algorithms for encryption and authentication and will not compromise security.
Atheon is a Windows based server/client program. It provides a clear example of several types of sockets and methods of encryption for developers. It is well commented and documented for education and easy incorporation into other programs.
The aim is to set up an instant messenger service (like ICQ, MSN,...) but totally in GPL licence. Server is written in Perl, the client side (GUI) in Java, and the submission form in PHP. See the README to know why poooms is different of others IM.
ivata groupware is a Groupware/Exchange/Intranet/Extranet system. Includes contacts/address book, calendar, library CMS and webmail. Java J2EE, EJB (optional), Hibernate, Struts and JSP. Runs on WebSphere/Tomcat/Resin/JBoss. See groupware.ivata.org.
JXTA Instant Messenger (J.I.M) is a project that aims to establish a server free, pure P2P Instant Messaging system. It is based on Java, JXTA (www.jxta.org) and the Java Cryptography Extension JCE and provides a nice Swing based GUI.
Bird Chat is a chat client / server software designed with an easy and simple interface. The installer make it fast to install both on server and clients.
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This is a set of .NET class libraries, designed to use various Internet protocols in a easy-to-use OO matter. So far it contains a POP3 and an IRC (Internet Relay Chat) library.
A small PHP script that queries a Half-Life server for player info and outputs the names, durations, and kill counts of those connected to a web page. Highly customizable output.
A fully functional Java Chat client and server. Compatible with Microsoft Java. Contains emoticons support, scriptable chat robots, SQL integration, themes, and many other features.
squalk is a lightweight IRC bot implemented in object-orientated PHP5. It utilises a modular architecture to make it versatile and easy to maintain. Also it makes coffee. If you do not like squalk, you are a heathen bastard and you should kill yourself.
Web Based Chat without the Browser (and without Java!!!) - HTTP Chat is a complete chat system that uses the Hyper Text Transfer Protocol (HTTP) to communicate and has a native client user interface. (currently Windows only)
NOTE: This code has not been updated since 2005. Keeping it here for historical purposes.
NOTE2: The code will not most probably compile against latest SILC libraries or with latest GTK either.
Silky WAS a secure chat client for SILC (Secure Internet Live Conferencing) protocol. The code is written in C and the GUI is implemented using the GTK toolkit. Supported operating systems include Linux and Windows.
Web Jabber is Web Based Jabber Client software. Supports Roster, Chat, Message, MUC( Groupchat ), Discovery and File Transfer. All are in one window, no popup except outside link/resource. Simple, easy and functional are law. In Java with Servlet.
SimpleIrc is a simple & complete implementation of the Irc protocol. SimpleIrc is written in C#, for the .NET environment. It is mainly intended for 3rd party developers so they can create their own Irc clients, in an easy and fast way.
pebwun is a hack of the console MSN Messenger client pebrot written in python. It offers many advanced features such as XMMS controle, lots of color, and many other things. It should work on anything with curses, and is useable with cygwin on windows.
The multiprotocol chat library with easy API. Use this as an example to build your instant messaging apps. Uses spOscar, libmsn, libyahoo2 libraries to support ICQ, AIM, MSN, Yahoo IM services. Now works under win32 only.
A multi-user IRC bouncer with IPv6 & SSL support for Unix & Windows. Also included is a custom inbuilt 'ident' service for networks requiring this to impose user limits or trusts.