Welcome, if you would like to post a comment please register.
We also encourage you to explore all things Zimbra with our team and members of the community.
I don't know of any, but you can make your own following the guide at ZWC 5.0 Themes. There are some restrictions as to what you can do regarding the Zimbra logo when using the Community Edition.
It's not difficult at all. My recommendation for a good place to start: look at the skin.properties file in the "lavender" or other simple skins and change the colors to fit your needs.
Bugzilla
Wiki
Source
Themes 
),
Linear Mode
