Catalog View Catalog View is a free database applet that can display your data in a grid display. Chart A parameter-based bar chart. Parameters can be set dynamically from a cgi or JavaScript. An excellent data display tool. Extremely configurable bar graphs, pie charts, and line graphs.
Source is included and it's all extremely well documented.
GraphReader An easy way to determine coordinates in scanned graphs. This applet reads a file which contains two lists of items which have one to one relationships. Example - States and Capitols. The JetChart Library is a set of java classes that displays a large variety of java charts from applets, java applications and servlets. Source is included in the zip file.