Finally i finished my project. It's a domain administrator for zimbra foss edition. Tested: zcs 6/7/8 foss edition.

Demo link:
Demo user: demo@demo.zimbra.com.tr
Demo pass:123456

Base language is turkish, i want to add english and perhaps in time the other languages.

Backup Management
* full backup
* domain based backup
* account based backup

Domain Management
* you can set a account for manage multiple domains.
* domain owner can create subdomains

Account Management
*listing accounts
*create/delete account
*modify account passwords
*show account mailbox

Also in panel you can create domain, set COS for any domain.