L2J is an alternate game server for Lineage2. The L2 protocol is reimplemented in the server, so you can play with this server without any modifications to the client (except changing the server IP address). The latest USA live client version is always supported, so don't expect this server to work with the PTS/Korean client.
Rgbtrade is a Web-based marketplace for the RGB Community Currency. It is based on ecological and social principles such as energy, recycling, fairness, transparency, and responsibility. It is a tool for sustainable development. First, you need a community and the will to use this RGB Community Currency. Technically, it requires a typical Web hosting environment with PHP and MySQL. Participants can place ads and make transfers using the RGB-currency unit. All information except email addresses is world-viewable.