APEX 4.2 will include the new "AnyChart Data Visualization Solution" based on HTML5.
But in case you can't wait for it or search for an alternative then here are some free solutions to play with:
http://www.jqplot.com/
Demo: http://www.jqplot.com/tests/line-charts.php
http://code.google.com/p/flot/
Demo: http://people.iola.dk/olau/flot/examples/graph-types.html
http://xaviershay.github.com/tufte-graph/
Demo: http://xaviershay.github.com/tufte-graph/test/integration.html
http://d3js.org/
Demo: https://github.com/mbostock/d3/wiki/Gallery
You still don't have enough then look at these nice aggregations:
http://www.smashingapps.com/2009/06/26/20-really-useful-and-free-scripts-to-plot-charts-in-your-site-or-blog-pages.html
http://www.splashnology.com/article/15-awesome-free-javascript-charts/325/
http://www.wsblogz.com/tools/18-free-javascript-resources-for-charts-and-graphs/
Demo: http://www.jqplot.com/tests/line-charts.php
http://code.google.com/p/flot/
Demo: http://people.iola.dk/olau/flot/examples/graph-types.html
http://xaviershay.github.com/tufte-graph/
Demo: http://xaviershay.github.com/tufte-graph/test/integration.html
http://d3js.org/
Demo: https://github.com/mbostock/d3/wiki/Gallery
You still don't have enough then look at these nice aggregations:
http://www.smashingapps.com/2009/06/26/20-really-useful-and-free-scripts-to-plot-charts-in-your-site-or-blog-pages.html
http://www.splashnology.com/article/15-awesome-free-javascript-charts/325/
http://www.wsblogz.com/tools/18-free-javascript-resources-for-charts-and-graphs/
