Optingun - Optingun helps online businesses to create forms to convert website visitors into subscribers using action driven popups and social optins.

Asterisk - An open source telephony switching and private branch exchange service for Linux.

Novocall - Novocall converts web visitors into sales calls in seconds.

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.

BetterContactForm - BetterContactForm provides a solution to companies for building contact forms on the web or mobile site.

FusionPBX - FusionPBX is an open source FreeSWITCH GUI.