JsTeX, a part of the SIMILE Widgets family of tools, is an open source JavaScript library capable of interpreting basic TeX encodings and transforming them into HTML definitions directly in a web page.

This tool has been retired by SIMILE Widgets, and the website is no longer maintained. Captures of the site are currently available via the Internet Archive.

Stanford Tregex and Tsurgeon is a bundled pair of tools from the Stanford Natural Language Processing toolset. Tregex is a utility for using tree relationships and regular expressions to match patterns in trees, while Tsurgeon is a tree transformation language.

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.

Data Wrangler is free web-based tool for interactive data cleaning and transformation. It takes raw data and transforms it into data tables for further analysis and cleaning. The results can be exported in a variety of data table formats, including Excel, R, Tableau and Protovis.

Apache Xalan is a free XSLT processor for transforming XML documents into HTML, text or other XML document types, offered by the Apache Software Foundation. This tool uses the Xerces XML parser to converty XML into internal nodesets, and is offered as both C++ and Java implementations.

XSugar is a tool designed to manage dual syntaxes when working with XML documents, developed by the Department of Computer Science, Aarhus University. From a user-provided specification, XSugar translates between XML syntaxs, and makes statistical checks to ensure transformations will be reliably bidirectional and contain valid syntax in accordance with the schema.

Abbot is a free tool for converting multiple XML texts with multiple markup schema into a common interoperable file, offered by the MONK (Metadata Offer New Knowledge) Project. It can also read an XML schema file and output procedures, and use them to convert other files into valid XML in alignment with the target schema. While Abbot focusses on TEI, it has been designed to flexibly accomodate other standards and can transform texts into any XML schema required.

OpenRefine (formerly Google Refine) is a free, open-source tool for working with messy data. It enables users to clean data, transform it between a variety of formats, extend it with web services, and link it to databases. This tool is available for Windows, Mac and Linux.