This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
JFreeChart is a free chart library for Java (GNU LGPL). A new version has just been released at: http://www.object-refinery.com/jfreechart/index.html JFreeChart supports pie charts (2D and 3D), bar charts (with optional 3D effect), line charts, time series charts, high-low-open-close, candlestick charts, bubble plots, combination charts, dual axes and more.