- OTRS Admin Manual
- OTRS::ITSM Manual
- OTRS Developer Manual
- OTRS API Reference
- otrs.com
The OTRS website with source code, documentation and news is available at www.otrs.com. Here you can also find information about professional services and OTRS Administrator training seminars from OTRS Group, the creator of OTRS.
- Online API Library
The OTRS developer API documentation is available for Perl and JavaScript.
- Developer Mailing List
The OTRS developer mailing list is available at http://lists.otrs.org/.