Related sites:

• asterisk.org

  Open Source Communications Software | Asterisk Official Site

  

• ring.gr.jp

  Ring Server Project

• openlab.jp

  Ring Server Open Laboratory

  

• kamailio.org

  Kamailio SIP Server

  

• techlaboratory.net

  Tech Laboratory - Smart and free open-source jQuery plugins

  

• theopenproxy.net

  theopenproxy.net

  

• xenserver.org

  Citrix Hypervisor | Open Source Server Virtualization