Mobbin - Latest mobile design patterns & elements library
Chart.js - Easy, object oriented client side graphs for designers and developers.
pttrns - iPhone and iPad user interface patterns
D3.js - D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS.
Page Flows - User flow design inspiration for mobile & desktop
Google Charts - Interactive charts for browsers and mobile devices.