Looking for IMP companion software

[FreeBSD]

Hello, I'm hoping to get some suggestions on an IMP companion software to
go with my current setup:

Blackbox setup with cyrus-imapd and postfix MTA running on FreeBSD. All
mail users are virtual and exist only in a sasldb. Running IMP 2.3.7 from
CVS.

I'm looking for a way for users to:
  1. Change their password
  2. Edit their own aliases
  3. Setup their own forwarding email addresses
  4. And maybe setup a vacation (not a necessity at this point...)

Since the users have no local account, none of them have .forwards or even
shell access to edit them with. Does anyone have any suggestions on web
software that will be a good IMP companion that might do the above?
Anything will be appreciated. Even just a name would be helpful, and give
me some place to start.

Thanks.


P.S. Horde FAQ said if the system admin allows it, users will get a
"Change Passord" link when they log in to Horde. Having trouble finding
this "link" in the Horde config files to enable it.