Jira Service Desk - IT service desk and customer service software by Jira Service Desk. Powerful ticketing system used by 25,000+ organizations. Try it free today.
freepbx - FreePBX is a web-based open source GUI that controls and manages Asterisk (PBX).
Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
Asterisk - An open source telephony switching and private branch exchange service for Linux.
ServiceNow - ServiceNow automates and manages global enterprise service relationships. Create a single system of record for enterprise services, automate manual tasks, consolidate legacy ITIL systems.
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.