ChartDirector is a fast and powerful charting component suitable for Ruby On Rails and standard Ruby applications. It's unique layering architecture enables you to synthesize the charts you want using standard chart layers. ChartDirector's comprehensive chart styles include pie, donut, bar, line, spline, step line, trend line, curve-fitting, inter-line filling, area, band, scatter, bubble, floating box, box-whisker, waterfall, contour, heat map, surface, vector, finance, gantt, radar, polar, rose, pyramid, cone, funnel, angular and linear meters and guages. ChartDirector charts are interactive with full suite of mouse events, supporting tool tips, clickable chart objects, and "drag to zoom" and "drag to scroll" features. AJAX enabled features allow charts to update without refreshing web pages. Easy to use and with comprehensive documentation. Come with numerous examples. Free trial available.