Bugzilla - General-purpose bugtracker and testing tool originally developed and used by the Mozilla project. (Source Code) MPL-2.0Perl
Frappe Helpdesk - Helpdesk software which helps you streamline your company's support, offers an easy setup, clean user interface, and automation tools to resolve customer queries efficiently. (Source Code) AGPL-3.0Docker
FreeScout - Email-based customer support application, help desk and shared mailbox (alternative to Zendesk and Help Scout). (Demo, Source Code) AGPL-3.0PHP/Docker
GlitchTip - Error tracking app to collect errors reported by your app. (Source Code) MITPython/Docker/K8S
ITFlow - Client IT documentation, ticketing, invoicing and accounting for MSPs (Managed Service Providers). (Demo, Source Code) GPL-3.0PHP
Roundup Issue Tracker - A simple-to-use and -install issue-tracking system with command-line, web, REST, XML-RPC, and e-mail interfaces. Designed with flexibility in mind - not just another bug tracker. (Source Code) MIT/ZPL-2.0Python/Docker
Trudesk - Trudesk is an open-source help desk/ticketing solution. (Source Code) Apache-2.0Nodejs/Docker
Zammad - Easy to use but powerful open-source support and ticketing system. (Source Code) AGPL-3.0Ruby/deb