Finally vTigerCRM 6 Beta have been released. It’s not fully functional yet, there are some modules missing as well as some new modules that did not exist in vTigerCRM 5.4 such as Google Calendar & Contact Sync. Since it’s just Beta version, you can not upgrade from 5.4 yet and it’s only for testing and bug reporting purposes. The RC/Stable is scheduled to be released September or October, however the schedule might change. Vtiger 6.0 Beta: Installation Files | Installation Manual | Developer Manual