Spark
Spark is the easiest and best alternative to using un-secure public IM networks. Manufacturer Description Spark is an Open Source, cross-platform IM client optimized for businesses and organizations. It features built-in support for group chat, telephony integration, and strong security. It also offers a great end-user experience with features like in-line spell checking, group chat room bookmarks, and tabbed conversations. Download Link: http://www.igniterealtime.org/downloads/index.jsp#spark Manufacturer:Ignite Realtime