Request Tracker Incident Response (RTIR) is one of the most popular IR ticketing systems. Its a open source project based on perl and MySQL. While it meets all your typical ticket tracking items, it needs lots of customization to meet your SOC needs. A few months ago I came across a project called TheHive (https://thehive-project.org/) that is a scalable open source platform.
Article Link: https://isc.sans.edu/diary/rss/23099