available as SILC Client for end users and it supports all SILC features, as SILC Server for system administrators who would like to set up own SILC server, and as SILC Toolkit for software developers who want to add SILC support in their products.
OpenWengo is a community of enthusiasts and developers, creating free software products related to communication over IP. The flagship product of the OpenWengo project is a softphone which allows you to ma
Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323 and SIP protocols. It supports many audio and video codecs, and is interoperable with other SIP compliant software and als
IAXmodem is a software modem written in C that uses an IAX channel (commonly provided by an Asterisk PBX system) instead of a traditional phone line and uses a DSP library instead of DSP hardware chipsets.
Asterisk is the most popular and extensible open source telephone system in the world, offering flexibility, functionality and features not available in advanced, high cost proprietary business systems. Asterisk is a complete IP telephony platform for business, and can be downloaded for free.