Description: Asterisk is an open source communications software that allows you to build telephony applications and services. It supports voice over IP, video conferencing, voicemail, auto attendant, interactive voice response, and more. It can be used to build PBX systems, call center solutions, and other communications platforms.
Type: software
Pricing: Open Source
Description: Google Voice and Video Chat is a free video calling and voice calling app from Google. It allows users to make audio and video calls to other Google Voice and Video Chat users for free, as well as make low-cost calls to landlines and mobile phones.
Type: software