Charts & Data Visualization

teeplot organizes visualization output and names files based on semantic plotting variables.

pygal provides Python tools for creating charts and visualizing data in applications.

RAWGraphs is a free, open-source tool for creating data visualizations.

Bar, line, area, and scatter charts can be created with dimple, an open-source charting API for D3.js.

Chart.js is an open-source JavaScript library for drawing charts on websites.

QuickChart generates chart images through an API that can embed visualizations in emails, reports, and other platforms.

amCharts lets users build interactive charts and maps in a browser from templates, then export, embed, or publish them.

Vega-Altair is a Python library for declarative statistical visualization.

Mermaid ASCII renders Mermaid-style diagrams as ASCII output, with examples for sequence charts and labeled arrows.

For custom data visualizations in JavaScript, D3.js provides tools for scales, axes, transitions, and DOM updates.

Create wireframes and user flow prototypes with Wireflow, a free online design tool.

UMLet provides free, open source UML drawing with a simple interface for making diagrams, including sequence and activity diagrams.

ParaView analyzes and visualizes data across settings ranging from laptops to supercomputers, according to its project site.

amCharts provides JavaScript charting components, maps, stock charts, and Gantt charts.

Bokeh creates interactive plots, dashboards, and data applications in Python.

Interactive charts for multidimensional datasets can be built with dc.js, a JavaScript library that supports Crossfilter.

The Chart.xkcd library creates charts in an xkcd style, with examples for line, XY, bar, pie, and radar charts.

text2diagram creates diagrams and charts from text descriptions, with real-time collaboration and document permissions listed on its page.

htmlwidgets lets R packages create interactive visualizations for the web.

JSON Crack visualizes and edits JSON, CSV, YAML, and XML as interactive graphs, with formatting, querying, and validation tools.

Plan website architecture with Octopus.do, a visual sitemap builder that includes low-fidelity wireframes.

C3.js provides reusable charts for websites through a library built on D3.js.

highcharter wraps the Highcharts JavaScript library for plotting R objects.

Seaborn provides statistical data visualization tools and plotting functions for Python.