Marauroa is Arianne's Multiplayer Online Engine Server, which you can use to build your own online games. Marauroa 3.3 introduces new features: RPEvents can have RPSlots. This means that events sent from the server to the client can contain more complex data. Games using Marauroa can now check the structure of the database using doesTableExist and doesColumnExist in order to update it.
There are also some bug fixes, to make Marauroa more stable, for example in the case of database errors. Full details can be found in the change log.