Jabber server and client?

OpenFire — almost a thousand users now feel great, you can write your own plugins your own, or based on what you've written.
A good solution for those who badly knows erlang.
Really better OpenFire don't know anything just.
It's probably about 4-5 years.

probably ejabberd and pidgin, anything better is still not up:)

Openfire Server
Spark / Psi

We have a bunch of OpenFire (server) and Spark (client for Windows), Kopete (Linux client machines).
\r
OpenFire despite its java-based no brakes.
OpenFire can interact with MySQL and other databases, and LDAP (AD) for user authentication.
\r
In any other jabber server I had ever seen.

Openfire as the server. No it is not necessary to know erlang, convenient web-GUI.
\r
Psi, Miranda, (you can sharpen corporate identity, to remove all the excess), or even much-loved some of the new kvip as a client.

The easiest for the VA and the familiar client — QIP, for people who want flexibility — Miranda. Well, the rest of the Psi, Pidgin, tkabber, etc (whatever is more convenient to let it uses)
From Jabber server — Ejabberd.

ejabberd
psi?