Core Plot - Cocoa plotting framework for OS X and iOS
PNChart - PNChart is a chart lib used in Piner and CoinsMan for iOS.
SwiftCharts - kevinbrewster - Simple, Sexy Line Charts for Mac and iOS
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
RJS Graph - RJS Graph is an artificial intelligence-based data management platform that allows users or developers to organize the data by manipulating the binaries, scientific, mathematical, and other insights with accurate results.
Google Charts - Interactive charts for browsers and mobile devices.