Mitel - Business Communications and Collaboration
Asterisk - An open source telephony switching and private branch exchange service for Linux.
SendMyCall - We offer virtual and toll free numbers in more than 65 countries and providing innovative, cost-effective solutions. Increase your Business presence worldwide - Contact Us!
FreeSWITCH - FreeSWITCH is an open-source media application designed to support popular protools such as SIP and WebRTC and provides a platform to develop voice and video applications.
Phonebooth - Phonebooth is one of the leading voip providers, providing phone systems & phone service for small businesses.
freepbx - FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).