Asterisk is a complete PBX and telephony toolkit in software. It runs on Linux, *BSD, MacOSX, and Solaris. It provides all of the features you would expect from a PBX and more as it enables developers to build customized voice applications of many types. Asterisk does voice over IP in many
... [More] protocols, and can interoperate with almost all standards-based telephony equipment using relatively inexpensive hardware. [Less]
blue.box is an open-source configuration and management software enabling the use of the FreeSWITCH and Asterisk switching libraries. It supports multi-tenancy, skinning and is completely open-source. It can be used with database and file replication to scale up to thousands of registered devices
... [More] and simultaneous phone calls. It can operate in the cloud or on the premise.
blue.box development is hosted and funded by the 2600hz project. http://www.2600hz.org [Less]
This project is a community effort to develop, debug and maintain a code library that implements the commonly used protocols used to exchange voice, video and fax data over IP networks. Originally part of the OpenH323 project, Opal has grown to include SIP and IAX2.
Kiax is a softphone (soft phone, VoIP client) with a simple and comfortable user interface for making VoIP calls to Asterisk PBX. It depends on the iaxclient library to use Asterisk's IAX2 protocol for easy call configuration and audio setup.
AndroVoIP -- VoIP for Android.
This project is very early in its development, and is not yet ready for testing. However, feel free to check out the Roadmap page on the wiki, or join the developers group to get involved.
The goal of this project is to provide an application to add standards
... [More] based VoIP (voice, and eventually video) functionality for the Android platform. [Less]