I know that N900 has a built in sip client however, I'm on holiday right now. and in here only fring/softphone seeems to be working with sip. built in sip client is blocked. Im using sipgate.co.uk.

My friends are currently using fring/softphone and those are working.
I found fring in extras-devel but it's not working. Msn works but only chat. Sip isnt working. no sound and doesnt recieve any calls

Is there any software which is available for N900?