Links finds collocates for words and displays links between them using a force directed graph. It shows term frequencies in proximity to keyword. It is a visualization and shows a web of terms.

Gadget, a part of the SIMILE Widgets family of tools, is an open source command line XML inspector for generating useful summaries from large amounts of well-formed XML data. It is particularly valuable when exploring, migrating or cleaning XML, in addition to evaluating schema emergence. This tool require a Java 1.4 or later compatible virtual machine and Maven 2.0 or above to run.

Gadget is no longer maintained, but information about it is still available via the Internet Archive.

Philologic is a free, open source full-text search, retrieval and analysis tool developed by the ARTFL Project and the Digital Library Development Centre, at the University of Chicago. This tool supports a wide variety of XML and SGML encoded documents, in addition to plain text, Dublin Core and HTML, and includes a MySQL back end. It is designed ot be light, fast and robust, boasts extensive use and testing, and can be used directly 'out of the box' with numerous configuration options built in.

Juxta is a free, open source tool for comparing and collating texts, originally intended for comparing multiple versions of the same text. It offers several views and visualization options, including histograms and side by side comparison. Juxta is available as both a desktop application and as a web service that can be integrated into the user's own website.

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.

TXM is a free, open source text corpus analysis environment. Its features include concordance, collocate search, frequencies based on the CQP full text search engine and statistical functions based on R packages. It can export results in CSV, XML or SVG format, and runs as a standalone desktop application in Windows, OS X and Linux environments, or as a web portal (download the leaflet for more).

TUSTEP (Tubingen System of Text Processing Tools) is a free, open source, widely-used toolbox for text processing. It is aimed at scholarly audiences, can work with texts in both latin and non-latin scripts, and is primarily designed for humanites applications. Its modules include data capture, information retrieval, text collation, text analysis, sorting and ordering, rule-based textual manipulation, data export and typesetting. The user manual is only available in German at this time. This tool has been in continuous development since the 1960s.

The NITE XML Toolkit (NXT) is an open source toolkit for working with language corpora, particularly useful for multimodal and cross-annotated data sets.

The Domeo Annotation Toolkit was an extensible web application for creating and sharing ontology-based stand-off annotations on HTML or XML documents. Users could add annotations manually, or via the tool's full or partial automation options. It also included functions for controlling access authorization and control for both personal and community annotations.