You can also look up for these other topics:
Framework
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Hacktoberfest
FreeScout — Free self-hosted help desk & shared mailbox (Zendesk / Help Scout alternative)
freescout-helpdeskUVdesk Opensource Community Helpdesk Project built for all to make a Full Ticketing Support System along with many more other features.
uvdeskFree and open-source web application for MSPs that streamlines IT documentation, ticketing, invoicing, and accounting, an alternative to ITGlue. It helps in managing and organizing client's IT informa
itflow-orgLaravel Ticket System, to help you manage your tickets easily.
coderflexxEvent Espresso 4 Core for WordPress: Build an Event Ticketing Website Today!
eventespresso