asterisk users - Dec 2004 - asterisk clients (need helpdesk solution)

Asterisk looks great on the server side, but it I'm not sure I've found 
a good solution for my users on the desktop. I've look at few windows 
apps, but most are just for configuring asterisk (which I've already 
done). The users here are used to using an app that lets them see caller 
id, switch between multiple calls, and has a dial directory.

Is there a good client app available for users that would cover at least 
some of these?

tia!