Java Open Source XChart Library
XChart features a dead-simple API for turning your data into beautiful charts including line, scatter, area, pie, donut, bubble, stick, bar, and histogram charts. Extra features include: real-time, themes, CSV import and export, export as PNG, JPG, BMP, GIF, SVG, EPS and PDF and much much more. For full description and examples visit the project on Github!
java.lang.NoSuchMethodException: org.apache.catalina.deploy.WebXml addServlet
The problem was that I was deploying catalina.jar within my .war file. Once I fixed up my build file to not include the catalina.jar file in the .war file, the error went away.
A Plethora of Sample Java Webapps that Run in Tomcat