easy and intuitive changing of range and scale (see google http://www.google.com/finance?q=INDEXDJX:.DJI,INDEXSP:.INX,INDEXNASDAQ:.IXIC)
http://jchart2d.sourceforge.net/usage.shtml (SWING)
http://code.google.com/p/swt-xy-graph/ (SWT)
http://www.swtchart.org/index.html (SWT)
http://swtgraph.sourceforge.net/ (SWT)