[Dovecot] GUI/WUI for creating (common) sieve scripts?

Anyone aware of a Web User Interface or GUI to allow users to create simple/common-type sieve scripts?

I found the sieve testing and have used it as I play; plus mangesieve (and Net:ManageSieve.pm) but want to allow users to build so some clicking and maybe a little typing and then end up with some filters.

So before I go invent this wheel I'd like to know what others are doing?

TIA, Rod