I want to be able to use the voice chat abilities of Skype, but I'd rather not sign up for another online service, privacy and all that.
So, I have been looking around and came across SIP, and would like to use Jitsi (or, if anyone has a better SIP client, please comment - Empathy is another I am looking at) just for voice (no video needed.) I have googled quite a bit and can't seem to find any sources.
Basically, do I need a Skype (or any other site for that matter) account to talk to someone who is using a Skype account?