Ragnarok Online Skill Planner

The Ragnarok Skill Planner is a project started in 2005 to help players preview their character skills for Ragnarok Online before spending the skill points to get them. As the skill requirements tree was not shown prior to points being spent, this tool was invaluable for new and veteran users alike. Translated by contributors around the world, the planner is available in a multitude of languages (although some are incomplete), and was a very good learning experience for PHP/MySQL/Javascript.