Open Source C# Messaging Platforms for Linux

See https://pidgin.im/about/ for more information. Pidgin is an instant messaging program which lets you log in to accounts on multiple chat networks simultaneously. It runs on Windows, Linux, and other UNIX operating systems. Pidgin is compatible with the following chat networks out of the box: AIM, ICQ, Google Talk, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, MXit, Novell GroupWise Messenger, Lotus Sametime, SILC, SIMPLE, MySpaceIM, and Zephyr. It is written in C and makes heavy use of GLib and GTK+. Finch is a command line instant messaging program. It also lets you log in to accounts on multiple chat network simultaneously, and it is compatible with the same chat networks as Pidgin. It is written in C and makes heavy use of GLib and ncurses.

It's just another Instant Messenger based on jabber

Galaxium is an multi-session, multi-protocol instant messenger application build for GNOME users. It uses the GTK# and GDI+ libraries as well as the Mono Framework.

An instant messenger network (including client and server) using Web services technology for communication. Makes use of external Web services for automatic translation of text messages between different languages. Client written in Java, server in C#.

Spider IM is (will be) a GTK+ based Jabber/XMPP client written in C# (Mono).

eXtensa is a highly customizable Instant Messenger, designed with portability in mind and focused on Free technologies.

metalicblue is a instant messenger server and client will very versatile and feturefull also free for linux/unix if you would like to join the project please email admin@kc8yho.org need developers and programmers always needing help and very nice team m