Many users search for addons for things Zammad already does natively if you enable them in the settings: Zammad Package Best Practices - Development
For specialized workflows, the open-source community and specialized IT agencies develop custom Zammad packages ( .zpm ). Asset Management and CMDB Linkage zammad addons
Because Zammad is "API-first," many people treat or Make (formerly Integromat) as their primary addon engine. Many users search for addons for things Zammad