Ryzom Core is the open source framework for developing MMORPGs, built upon NeL, the Nevrax Library game engine, and published under the AGPLv3 license. Graphics, translations, and select leveldesign assets from the Ryzom game are available under both the CC-BY-SA 3.0 and Free Art License 1.3.
Support for the Ryzom game, operated by Winch Gate, as well as the Ryzom Forge team, can be reached through Ryzom.Chat.
TODO: We need a Getting Started route for both NeL, using the Snowballs demo, and another route for Ryzom Core. It's important to advertise NeL as well, as starting out with Ryzom Core is overwhelming, and skips over several essential basics. Ryzom Forge interested folks should be forwarded to the Ryzom Forge team.
For building your own game.
Support for Ryzom Forge is provided by Winch Gate, over on Ryzom.Chat.
To contribute to the commercial Ryzom game published by Winch Gate.