D3.js is a free, open source JavaScript library for manipulating documents with data utilizing HTML5, SVG and CSS3. It is designed to create visualizations that work with current web standards to make the best possible use of the most recent browsers without requiring a proprietary framework. This tool allows users to bind data to an Document Object Model (DOM) and apply data-driven transformations to the document.

Protovis is a free, open source tool for composing custom views of data from simple elements such as bars or dots. Marks are defined through dynamic properties to allow inheritance, scales and layouts for simplified visualization construction. This tool uses JavaScript and SVG in order to ensure web-native visualizations. Protovis is no longer under active construction; many of the concepts used in its development have been implemented in its successor, D3.js.

RDF2SVG is a web-based tool from the Rhizomik initiative for transforming RDF/XML data into an SVG representation. It can also accept N-triples and N3 input, and includes a feature for filtering the user's defined preferred language from the source data.   

The W3C RDF Validation Service is a free, web-based tool for checking RDF documents for errors and displaying the results. It can display in triples, a graph, or a combination of the two, and can format the graph in a variety of file formats including PNG, SVG and GIF. Documents can be pasted directly into the provided form or from a provided URI.

Google Charts (formerly the Google Visualization API) is a web-based interface for interactive data visualization via HTML5 and SVG. It includes a number of preset chart types ranging from line charts to word trees and all are customizable. A separate selection of user community contributed chart types is also available. Within a chart, the API identifies events that users can trigger with presets ranging from simple clicks to Javascript methods, and enable users to construct chart dashboards that can be embedded in their website along with the chart proper.

RAW is a free, open-source web application for creating visualizations that can be exported in SVG or PNG format and embedded into a website. Users can upload data with RAW's web interface and generate a variety of vector-based visualizations. RAW uses the D3.js library, and is maintained by the Density Design research studio at Polaitecnico di Milano.

Inkscape is an open-source vector based imaging programme similar to Adobe Illustrator, Corel Draw, Freehand, or Xara X.

Jarnal is an open-source application for notetaking, sketching, keeping a journal, making a presentation, annotating a document - including pdf - or collaborating using a stylus, mouse or keyboard. It is similar to Microsoft Windows Journal and to the earlier Mimeo whiteboarding and Palm notepad applications.