SciChart has an extensive suite of visually-impressive graphing features that have really augmented our tool's ability to display data. I am also impressed by the development team's responsiveness to our bug reports and feature requests, including many of them in new releases.

Fast charts that have no issue with many data points or high frequency data. Also, they look nice as you can customize the theme such that it perfectly fits your application.

SciChart is by far the most performant charting library for WPF applications and Javascript, with easy to customize plots and chart modifiers