The best open source alternative to D3.js is Graphviz. If that doesn't suit you, our users have ranked more than 50 alternatives to D3.js and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to D3.js are RAWGraphs, Chart.js, Plotly and Processing.js.
Graphviz is open source graph visualization software. Graph visualization is a way of representing structural information as diagrams of abstract graphs and networks. It has important applications in networking, bioinformatics, software engineering, database and web design...
RAWGraphs is an open source app built with the goal of making the visualization of complex data easy for everyone. Born as tool for designers and vis geeks, RAWGraphs aims at providing a missing link between spreadsheets and vector graphics editors.
Easy, object oriented client side graphs for designers and developers. Open source HTML5 charts using the canvas tag. Chart.js is an easy way to include animated graphs on your website.
Plotly is the easiest way to graph and share data online. Open-source libraries for JavaScript (comparison with HighCharts at https://plot.ly/highcharts-alternative/), Python, R, and MATLAB.
Processing.js is an open programming language, port of the Processing Visualization Language, for people who want to program images, animation, and interactions for the web without using Flash or Java applets. Processing.
Vega-Lite provides a higher-level grammar for visual analysis, comparable to ggplot or Tableau, that generates complete Vega specifications. Vega-Lite specifications consist of simple mappings of variables in a data set to visual encoding channels such as x, y, color, and size.
Penrose is a platform that enables people to create beautiful diagrams just by typing mathematical notation in plain text. The goal is to make it easy for non-experts to create and explore high-quality diagrams and provide deeper insight into challenging technical concepts.
This project is an attempt to build re-usable charts and chart components for d3.js without taking away the power that d3.js gives you. This is a very young collection of components, with the goal of keeping these components very customizeable, staying away from your standard...
Bokeh is a Python interactive visualization library that targets modern web browsers for presentation. Its goal is to provide elegant, concise construction of novel graphics in the style of D3.js, but also deliver this capability with high-performance interactivity over very...
Apache ECharts is a free, powerful charting and visualization library offering easy ways to add intuitive, interactive, and highly customizable charts to your commercial products. It is written in pure JavaScript and based on zrender, which is a whole new lightweight canvas...
Frappé Charts is a simple, responsive, modern charts library for the web with zero dependencies and a roughly 15k gzipped file size. From the makers of ERPNext, the library offers a fast alternative with minimal effort needed to visualize data in sleek charts.
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It's more like an enhanced alternative to D3.js since RAWGraph is based on D3.js