OpenSource Helpdesk
- FreeScout – Open Souce ZenDesk clone. PHP/Laravel. Very active project.
- https://www.uvdesk.com/en/ – Open Source Helpdesk software
- https://osticket.com/ – Free Open Source Helpdesk.
- OpenSupports.com – Free Open Source Helpdesk.
- https://zammad.org – Open Source helpdesk in Ruby On Rails. https://github.com/zammad/zammad
- https://otrs.com/ – Written in Perl. Open source version with Limited features. https://github.com/OTRS/otrs
- https://www.uvdesk.com – Open Source version available https://github.com/uvdesk/community-skeleton
- https://glpi-project.org/ – open source tool to manage Helpdesk and IT assets!
Hosted Helpdesk
- Freshdesk – Have free plan with unlimited agents