XPlanner+ is an open source (free) project planning and bug tracking tool for agile teams written on Java. Xplanner+ is based on XPlanner, and has new and improved features, such as: fancy design, email notifications for tasks, redraw charts button, drag and drop stories.
Tools for Scrum and Agile Project Management
Agilefant is a simple but powerful solution for managing software development projects and related activities. It brings together the perspectives of organizing daily work, long-term product and release planning and project portfolio management.
IceScrum is a tool for development teams using Scrum or another agile developpement process.