From The Document Foundation Wiki
There are multiple and various ways in which you can join and help the LibreOffice project.
- Are you a developer? You can help out with development.
- Do you want to propose a new feature or report a bug? Report it at our bugzilla instance!
- Are you a copywriter or translator?
- Are you trying to help developers? The QA (Quality Assurance) team needs you.
- Are you a (UX) designer? The design team would love to hear from you.
- Help users answering their questions at ASK.Libreoffice and the localized version (put a /LANGUAGECODE at the end of the url)