Highcharts provides 20 different types of [charts](http://www.highcharts.com/docs/chart-and-series-types/chart-types) to choose from, and they make it simple to [combine](http://www.highcharts.com/docs/chart-and-series-types/combining-chart-types) chart types.
Ranked in these QuestionsQuestion Ranking
Pro A lot of different data formats
xml, json, csv, js api.
Pro Lots of chart types
Including bar, line, area, scatter, waterfall, spline, funnel, bubble, polar, column, columnrange, pie, box plot, angular gauge, areasplinerange, and other types of "basic" charts (AnyChart); Gantt charts (AnyGantt); Maps (AnyMap), and Financial/Stock charts (AnyStock).
Pro Independent from other js libraries
no jQuery or libraries.
Pro IE6+ support, along with mobile browsers
Pro Experienced team and long product history
AnyChart is on the market since 2003.
Pro Events support
Any part of chart can be adjusted.
Pro A lot of integration templates
Technical integration templates for many popular stacks.
Pro Good documentation
Very handy with examples and explanations.
Pro Excellent browser support
Highcharts supports all modern browsers (including IE6 and up), iOS and Android.
Pro Lots of good examples
The site has a selection of good examples that will help you get started quickly.
Pro Library to support Microsoft .NET
Compatable with .NET framework 4+, can develop graphs from server side for ASP .NETand ASP .NET MVC applications.
Pro Supports multiple Y axes
Important for trend correlation, eg. comparing number of clicks to sale amounts. Not same scales / units.
Once you use it on anything but a site, it rapidly gets expensive.
Highcharts is not free for commercial projects, with a starting price of US$590 for Single Developer + Maintenance & Support
Con The examples are not that great
For instance, example's JsFiddle may get stalled when loading.