glpi-project / glpi

GLPI is a Free Asset and IT Management Software package, Data center management, ITIL Service Desk, licenses tracking and software auditing.

zammad / zammad

Zammad is a web based open source helpdesk/customer support system.

RotherOSS / otobo

OTOBO is one of the most flexible web-based ticketing systems used for Customer Service, Help Desk, IT Service Management. https://otobo.io/