1)   PBXPress Live CD Demo 1.1
PBXpress is a voice over IP (VoIP) replacement of traditional PBX in the era of the Internet. All of your phones are connected and provisioned via an IP network, your phone calls are always recorded and connected at a fraction of the usual cost.

 2)   Axon Virtual PBx System 2.11
Axon is a virtual IP PBx for Windows PCs featuring a one click installation setup and a web management console that makes configuring your new PBx easy. Axon offers all the normal features of a traditional PBX. Set it up in your office or home.

 3)   Voicent Flex PBX 1.0
Voicent Flex PBX is an easy-to-use software-based PBX system. It supports both analog phone services and VOIP services. Besides PBX features like auto attendant and unlimited call queues, it is extensible through IVR Studio for database access, etc.