Zammad is a web based open source helpdesk/customer support system
翻译 - Zammad是基于Web的开源帮助台/客户支持系统
GLPI is a Free Asset and IT Management Software package, Data center management, ITIL Service Desk, licenses tracking and software auditing.
翻译 - GLPI是一个免费资产和IT管理软件包，ITIL服务台，许可证跟踪和软件审核。
Attendize is an open-source ticket selling and event management platform built on Laravel.
翻译 - Attendize是一个基于Laravel构建的开源门票销售和事件管理平台。
FreeScout — Free self-hosted help desk & shared mailbox (Zendesk / Help Scout alternative)
翻译 - FreeScout —免费的自托管服务台和共享邮箱（Zendesk /帮助服务台替代品）
Helpy is a modern, open source helpdesk customer support application. Features include knowledgebase, community discussions and support tickets integrated with email.
翻译 - Helpy是一个现代的开源帮助台客户支持应用程序。功能包括知识库，社区讨论以及与电子邮件集成的支持票证。
alf.io - The open source ticket reservation system for conferences, trade shows, workshops, meetups
翻译 - alf.io-用于会议，展览，研讨会，聚会的开源门票预订系统