Ryzom Core is a toolkit for the development of massively online universes. It was used to make the commercial MMORPG Ryzom. It provides the base technologies and a set of development methodologies for the development of both client and server code.
Novius OS Forms is an application for Novius OS that allows you to create and publish forms for collecting answers from your site visitors. It could be used for contact forms, order forms, subscriptions, etc.