Psi is a capable Jabber client aimed at experienced users. Its design
goals are simplicity and stability. Psi is highly portable and runs on
Windows, Unix/X11, and MacOS X.

The interface is very ICQ-like. Alerts appear in the contact list when
events are received, and things like subscriptions requests appear as
system messages (ICQ users know these well). Even Chats are
queued in the contact list. Also, chats are remembered by default,
so that you don't have to keep a bunch of windows open for each person.
Just close the chat window. If you open it again it will all be there.

Psi is minimal but powerful. There are keybindings for just about
everything, Unicode is supported throughout, and contacts are cached
offline. Security is also a major consideration, and Psi provides it for
both client-to-server (SSL) and client-to-client (GnuPG).

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