skypeforlinux : P2P Internet Telephony (VoiceIP) client ( https://www.skype.com/ )
trillian : Trillian is a multi-platform multi-protocol chat client. Attention: you'll need a pro account to use trillian for now! ( http://www.trillian.im )
viber : Free calls, text and picture sharing with anyone, anywhere! ( http://www.viber.com )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a cynede
For Paludis use this rsync : rsync://gentoo.zugaina.org/cynede-portage
If you have a problem : ycarus(-at-)zugaina.org