Solutoire Lightweight Plotr with Prototype
Solutoire took part of PlotKit and wrote some parts himself, then made Plotr which does not need the Mochikit library to work with. It is also a lightweight charting framework with only 12kb. There are more than 30 options for you to customize the chart. Like PlotKit, you can display Pie Charts, Line Charts and Bar/Column Charts.
Requirements: Firefox 1.5+, Safari 2.0+, Opera 9.0+, IE6+ (emulated)
License: BSD License