Depending on what you mean with 'developed' Vanilla is still developed.
Many of the brave vanilla admins/users develop dynasnips on their own. Some of them are very cool and free for download:
ppp's Sniptags Package
Taggy's RSS Feed
I'm sure, there are more like that on the net, but after doing some little Rebol exercies you'll also be able to create new Dynasnips on your own.
As I know there is no Vanilla using RDBMS, but there is a Vanilla-Clone called Cuntilla based on PHP/MySQL:
At the moment the author doesn't distribute any sources, but you may get them by contacting the author.
The latest official distribution is 0.6.2 and can be downloaded at http://vanillasite.at/space/download
So, go and improve the worldwide vanillization ;)