Software that uses or supports CELT

Applications

Ekiga
Ekiga is a VoIP and video conferencing application for GNOME
FreeSWITCH
FreeSWITCH is an open source telephony toolkit, ranging from softphone to softswitch
jack-audio-connection-kit (netjack)
JACK over a network
NexGenVoIP
A Next Generation Telephone System
RoarAudio
A network transparent sound server
Soundjack
Network Music Performance (MNP) client application

Frameworks/libraries

GStreamer
GStreamer is a library for constructing graphs of media-handling components
liboggz
Easy to use Ogg support library

Other uses

Radio CHNC
Studio link made by Jonathan Thibault from Navigue