Zimlets are add-on applications that enhance the functionality of your client. You can disable any of the Zimlets your system administrator may have enabled for your account.
Click Preferences and select Zimlets. Zimlets that are available for your account are listed.
To disable a Zimlet, uncheck the box next to the Zimlet.
Click Save. You will need to refresh your browser to apply the change.
To learn more about Zimlets or to upload a Zimlet, go to http://gallery.zimbra.com/. You can upload new Zimlets from the Preferences>Zimlets page.