VoiceBuntu (formerly Ubunterisk) is an Ubuntu-based live CD that uses Asterisk and VoiceOne to provide VoIP service without any system installation process. VoiceOne is a Web-based GUI for the Asterisk PBX. Ubunterisk can be used as a phone client as well as a PBX server. Ubunterisk can be administered either remotely or by accessing its local GUI. A capser-rw filesystem is used to store the system's data persistently.
BioCluster is a peer-to-peer clustering platform for Asterisk, the open source PBX, which allows Asterisk to be used as a full carrier-grade telephony solution. It is meant to be installed on several machines together with Asterisk, turning them into a VoIP cluster. While the BioCluster peer-to-peer protocol was initially designed to cater to Asterisk-based clustering solutions, the BioCluster framework is capable of being extended to support various forms of normally unclustered devices or software packages.
The SIP Switch is a Web application which allows you to use multiple SIP accounts on the same phone. This lets you use the call plans of different VoIP companies (using SIP) with one IP phone device. It does the third party SIP registration so you can receive all your calls on the sipswitch account. On dial out, you can set prefixes to make your outgoing calls with such or such provider.
KCall is the telephony application of Kontact. It supports computer telephony integration and at the same time integration into KDE's infrastructure. KCall does this by using KDE's addressbook, which in turn can be a server-based groupware addressbook. KCall uses the Decibel realtime communication framework for call management.
Thunderbolt is a middleware infrastructure suite that includes connectors, Java development libraries, a business process design GUI, and a system monitor GUI. It is appropriate for both telco and financial services. It provides the basis for a simple, efficient integration infrastructure which can be easily extended. While maintaining a SOA in mind, it can easily orchestrate Web services and legacy systems. It's also useful for developing proof of concept projects requiring processing in real time, batch, or both.