Something like keepass. Could be real simple though.

Schema:
* unique id
* zimbra user id
* Easy to recognize name for link
* url to logon page
* username
* password
* username field name (from html page to simulate post)
* username password field name (from html page to simulate post)

Might require some IT install work like setup a mysql database to store all the info.

Behavior:
1. User right clicks on the zimlet shows list of web sites that have been entered. User
2. single click or double click open the add new website form.