Interactive JavaScript charts - the Highcharts library repackaged for Meteor.
Highcharts is a charting library written in pure HTML5/JavaScript, offering intuitive, interactive charts to your web site or web application. Highcharts currently supports line, spline, area, areaspline, column, bar, pie, scatter, angular gauges, arearange, areasplinerange, columnrange, bubble, box plot, error bars, funnel, waterfall and polar chart types.
The Highcharts library is free for non-commercial licenses. If you wan't to use Highcharts for commercial purposes, have a read through the licensing procedure: http://shop.highsoft.com/highcharts.html
Highstock lets you create stock or general timeline charts in pure JavaScript, including sophisticated navigation options like a small navigator series, preset date ranges, date picker, scrolling and panning.