RuneScape
RuneScape is a Java-based MMORPG (Massively Multiplayer Online Role-Playing Game) operated by Jagex Ltd. It's a free game with an option to upgrade for many more features.

Windows Live Messenger
A free messaging client that lets you talk with other people on your "Buddy List". A main form of communication between the members of Zdzira.

TeamSpeak
TeamSpeak is proprietary Voice over IP software that allows users to speak on a chat channel with other users, much like a telephone conference call.

Swiftkit
SwiftKit is a Toolkit designed for RuneScape and MechScape players by conveniently bringing together all common RuneScape and MechScape tools and features from all over into one single application.

AOL Instant Messenger
A free Instant Messaging client that lets users talk to each other. This client is not as common throughout Zdzira, but still worth looking into.

Zybez
Runescape Help, guides, items, quests, and more!

Tip.It
A Runescape fan site with skill guides, quest guides, maps, calculators, informative databases, tips, and much more to help you with Runescape.

CGI:IRC
This client runs directly in your browser and is like any other web site. There are no downloads required, no Java, and there are no outgoing connections other than the one held to the web server.