qutecom
Description: SIP-based software telephone with video and chat features
QuteCom is a Voice-over-IP application based on standard protocols like SIP
and RTP. It enables voice, video and text chat between two clients. Features
include a contact list with multi-protocol presence and status, call history
and NAT traversal capability.
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QuteCom is the new name of the WengoPhone project, after it was dropped by
Wengo and taken on by MBDsys.
Homepage:
http://www.qutecom.org/
Ekiga
Description: H.323 and SIP compatible VoIP client
H.323 and SIP compatible videoconferencing and VoIP/IP-Telephony application
that allows you to make audio and video calls to remote users with H.323
hardware or software (such as Microsoft Netmeeting) as well as SIP endpoints.
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It supports all modern videoconferencing features, such as contact roster,
presence status, high-quality audio and video codecs, various video
resolutions, registering to an LDAP directory, gatekeeper support,
making multi-user conference calls using an external MCU, using modern
Quicknet telephony cards, and making PC-To-Phone calls.
Homepage:
http://www.ekiga.org