1. Chart.js: This is a popular JavaScript library that can be used with PHP to create interactive and responsive charts. It supports a variety of chart types, including bar charts, line charts, pie charts, and more.

2. PHPChart: This is a PHP library that provides a simple and easy-to-use interface for creating charts. It supports a variety of chart types and offers customization options such as colors, labels, and tooltips.

3. PHPlot: This is another PHP library for creating various types of charts, including bar graphs, line graphs, and pie charts. It supports a variety of customization options and also provides support for rendering images of charts.

4. FusionCharts: This is a JavaScript charting library that can be used with PHP to create beautiful and interactive charts. It offers a wide range of chart types and provides extensive customization options.

5. Google Charts: This is a powerful charting library provided by Google. It can be used with PHP to create various types of charts, including line charts, bar charts, pie charts, and more. It offers a rich set of customization options and supports real-time updating of charts.

6. Plotly: This is a data visualization library that supports various chart types, including scatter plots, line charts, bar charts, and more. It can be used with PHP to create interactive and responsive charts with support for interactivity and animation.

7. Highcharts: This is a JavaScript charting library that can be used with PHP to create interactive and responsive charts. It supports a wide range of chart types, including line charts, bar charts, column charts, and more.

8. CanvasJS: This is a JavaScript charting library that can be used with PHP to create interactive and animated charts. It supports a variety of chart types, including line charts, bar charts, pie charts, and more. It offers a rich set of customization options and supports real-time updating of charts.