From Joomla! Documentation
- The Bug Squad uses an ongoing Skype chat. Once you are added to the squad, a coordinator will include you in the Skype chat.
- Joomla! CMS Development Mailing list (Joomla extension developer help? Please use Joomla! General Development Mailing list)
- Joomla! CMS Issue Tracker
- Joomla! CMS Github Repository