Highcharts:
A JavaScript charting library that supports a variety of chart types, including stock charts.
Official Website: Highcharts
Chart.js:
A simple yet flexible JavaScript charting library that can be used for various chart types, including line charts that could represent stock data.
Official Website: Chart.js
Plotly:
A Python graphing library that supports interactive charts, including stock charts.
Official Website: Plotly
Matplotlib (Python):
A widely used Python plotting library that can be used to create various types of charts, including stock charts.
Official Website: Matplotlib