Free VOIP software, QuteCom is the new name for the open source softphone previously known as WengoPhone

QuteCom (previously called WengoPhone) is a free program SIP compliant VoIP client developed by the QuteCom (previously OpenWengo) community under the GNU General Public License (GPL). It allows users to speak to other users of SIP compliant VoIP program at no cost. It also allows users to call landlines, cellphones, send SMS and make video calls. None of these functionalities are tied to a particular provider allowing users to choose among any SIP provider.

QuteCom uses your broadband internet connection (DSL, Cable or WiFi) to provide telephony services. Call your friends, family, and colleagues anywhere, anytime, for free. Use video and chat features, also for free.

QuteCom Features:
1. SIP compliance
2. Provider agnostic
3. Allows users to send SMS to France
4. NAT traversal
5. Cross-platform
6. Audio smileys
7. Qt-based GUI
8. chatting with MSN, AIM, ICQ, Yahoo and XMPP users
9. Encryption via SRTP, but key exchange over Everbee key that is not a Standard

QuteCom supports the following features:
1. fully SIP-compliant softphone with audio, video, and presence support
2. Instant messaging features including support for Jabber/GoogleTalk, AIM/ICQ, MSN and Yahoo (though with limited support for the specific features of each protocol)
3. available for Linux, MacOSX, and Windows
4. NAT traversal including STUN and HTTP proxy support
5. File transfer abilities
6. use of libgaim from Gaim to allow interoperability with many IM protocols.
7. Encryption using SRTP with AES 128 bit standard encryption.
8. 100% translations for 13 languages.

QuteCom also offers low cost international rates (prepaid or unlimited) to land lines or mobile phones, and an SMS gateway service. The QuteComphone is an easy-to-use program, that enables you to call anyone, anywhere, anytime, for free. Its native use of the SIP protocol makes it interoperable with most on the known VoIP technologies. It already has built-in video abilities, and is will offer many more features in the near future such as calling ordinary phones (land lines and mobiles) at very low prices, conference calls, user communities and innovative cellphone-based services.

The license of this software is Freeware, you can free download and free use this internet phone software.