Here are some examples for Flot, the Javascript charting library for jQuery:
Basic Usage
- Basic example
 - Different graph types and simple categories/textual data
 - Setting various options and annotating a chart
 - Updating graphs with AJAX and real-time updates
 
Interactivity
- Turning series on/off
 - Rectangular selection support and zooming and zooming with overview (both with selection plugin)
 - Interacting with the data points
 - Panning and zooming (with navigation plugin)
 - Automatically redraw when window is resized (with resize plugin)
 
Additional Features
- Using other symbols than circles for points (with symbol plugin)
 - Plotting time series, visitors per day with zooming and weekends (with selection plugin) and time zone support
 - Multiple axes and interacting with the axes
 - Thresholding the data (with threshold plugin)
 - Stacked charts (with stacking plugin)
 - Using filled areas to plot percentiles (with fillbetween plugin)
 - Tracking curves with crosshair (with crosshair plugin)
 - Plotting prerendered images (with image plugin)
 - Plotting error bars (with errorbars plugin)
 - Pie charts (with pie plugin)
 - Rendering text with canvas instead of HTML (with canvas plugin)