Saying it's a fraud is a bit harsh.
Yahoo! and Facebook are both unethical companies anyway.
And I'd avoid Google as much as possible as well.
SIP, I don't know about it.
Jitsi is way beyond Pidgin when it comes to replacing both Skype (video chat)
and Teamviewer (remote assistance), with encryption, and this is no small
feat. Well, when you manage to make it work, but it's not a finished program
yet.
But I agree that trying to do so many things in one program is a bad
strategy, specially when very few work consistently.