TextArc is a free visualization tool that represents an entire text on a single page. It has elements of an index, concordance and summary all in one place, encouraging the viewer to use its juxtapositions to uncover meaning. The web-based applet is preloaded with thousands of text collected from Project Gutenberg. Note: TextArc was designed for browsers circa 2002 and requires Java SE 6 to run.

Gigapixel is a free tool to facilitate experiments in collaborate workspaces, enabling printed visualizations to be augmented with projectors and mobile devices. This tool has been succeeded by PaperToolKit, and continues to be available as a reference resource.

Graphviz is a free, open source graph visualization tool in constant development since 1988. It represents structural information as diagrams of abstract graphs and networks.

AntCLAWS-GUI is a free graphical user interface intended for use with the Lancaster University CLAWS parts of speech tagger. This GUI requires installation of CLAWS to operate.

AntWordProfiler is a free tool for word profiling. For each word in a document, it will generate the base form and a list of possible related words, provide statistics and frequency data and list word types. It can also process files separately or as a batch.

CLAWS (Constituent Likelihood Automatic Word-tagging System) is a free parts-of-speech tagging tool from Lancaster University. It has been continuously developed since the 1980s, has consistently achieved 96-97% accuracy, and has been applied to the over 100 million word British National Corpus. This tool is available for download in addition to an on-line 'trial' version.

This prototype was produced as a proof-of-concept for the Criminal Intent project.  It allows the records of the Old Bailey Online project to be searched such that the returned results can be viewed as either a timeline or a concordance of terms.  The tool allows for reasonably complex queries to be placed and a range of different formats for the returned charts to be selected.  The tool is primarily built with Python and SQLite and makes use of the Google Chart API for some output options.

ATLAS.ti is a tool for systematic qualitative data analysis released under a for-pay license. It offers multi-window frames, overviews generated through interactive network views utilizing visual interconnections, and cloud views and reports. A free demo version is also availalble, and does not include a time limit. This tool was first developed in 1989 and has been in continous development since. The web edition has been available since 2002.

Tesseract is a free raw OCR engine originally developed by HP Labs and now maintained by Google. It works with the Leptonica Image Processing Library, and is capable of reading a variety of image formats. It can convert images to text in over 40 languages.