Given Skype's slow development speed for the GNU/Linux version and its recent acquisition by Microsoft, I am looking for alternative softwares.
What FLOSS (free/libre/open-source software) Skype alternatives are available?
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These all are SIP clients which means they all can be used to call each other and they just need a SIP address (like your mobile number). You can get a SIP address for free from many providers (Ekiga, jit.si, iptel), some of which (sip2sip.info, ippi.com, localphone.com, nonoh.net) also have PSTN gateways into the normal phone network which allows you to make and receive regular calls from/to your SIP client (for a fee). For various reasons some clients may not work with some providers (for example, for Nonoh and Iptel, Blink works but Jitsi, Ekiga, and Linphone don't).
Ekiga (available in the software center)
Here is First use documentation for ekiga .
Here is documentation on how to use the PC to Phone feature in ekiga .
SFLphone (available in the software center)
Twinkle (available in the software center)
Yate VoIP (available in the software center)
QuteCom (available in the software center)
Linphone (available in the software center)
You can use Empathy (pre-installed in Ubuntu) instead of Skype.
For users of Windows, OS/X, you can ask them to install Google Voice and Video chat, http://www.google.com/chat/video
Empathy and Google Voice and Video chat are compatible with each other, so you can have voice and video chats!
There is an option for VoIP (SIP) support in Empathy. You install the
In addition, with Empathy you have many additional options (not found in basic Skype), including
Not FLOSS but you can use Googles Voice and Video chat from within the browser.
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