Ekiga (formerly called GnomeMeeting) is a VoIP and video conferencing application for GNOME and Microsoft Windows. It is distributed as free software under the terms of the GNU GPL-2.0-or-later. It was the default VoIP client in Ubuntu until October 2009, when it was replaced by Empathy. Ekiga supports both the SIP and H.323 (based on OPAL) protocols and is fully interoperable with any other SIP compliant application and with Microsoft NetMeeting. It supports many high-quality audio and video codecs. Ekiga was initially written by Damien Sandras in order to graduate from the University of Louvain (UCLouvain). It is currently developed by a community-based team led by Sandras. The logo was designed based on his concept by Andreas Kwiatkowski. Ekiga.net was also a free and private SIP registrar, which enabled its members to originate and terminate (receive) calls from and to each other directly over the Internet. The service was discontinued at the end of 2018. Features Features of Ekiga include: Integration Ekiga is integrated with a number of different software packages and protocols such as LDAP directories registration and browsing along with support for Novell Evolution so that contacts are shared between both programs and zeroconf (Apple Bonjour) support. It auto-detects devices including USB, ALSA and legacy OSS soundcards, Video4linux and FireWire camera. User interface Ekiga supports a Contact list based interface along with Presence support with custom messages. It allows for the monitoring of contacts and viewing call history along with an addressbook, dialpad, and chat window. SIP URLs and H.323/callto support is built-in along with full-screen videoconferencing (accelerated using a graphics card). Technical features Call forwarding on busy, no answer, always (SIP and H.323) Call transfer (SIP and H.323) Call hold (SIP and H.323) DTMF support (SIP and H.323) Basic instant messaging (SIP) Text chat (SIP and H.323) Register with several registrars (SIP) and gatekeepers (H.323) simultaneously Ability to use an outbound proxy (SIP) or a gateway (H.323) Message waiting indications (SIP) Audio and video (SIP and H.323) STUN support (SIP and H.323) LDAP support Audio codec algorithms: iLBC, GSM 06.10, MS-GSM, G.711 A-law, G.711 μ-law, G.726, G.721, Speex, G.722, CELT (also G.723.1, G.728, G.729, GSM 06.10, GSM-AMR, G.722.2 [GSM‑AMR-WB] using Intel IPP) Video codec algorithms: H.261, H.263+, H.264, Theora, MPEG-4 History Ekiga was originally started over Christmas in the year 2000. Originally written by Damien Sandras it grew to being maintained by a team of nine regular