Overview is a free, web-based tool for document mining. Developed by and for journalists, Overview is also broadly applicable to other corpus-based research applications. Aside from providing advanced search features such as regular expressions and fuzzy matching, Overview automatically sorts documents according to topic and provides a fast visualization and reading interface. You can apply tags to search results, individual documents, or entire topics to track what you've found, then export the entire document set with its tags to perform further processing or create visualization. It’s been used for qualitative research, social media conversation analysis, legal document review, digital humanities, and more. 

Casual is a free, open source tool for generating a visualization of concepts from a key word search. It uses Wikipedia for conceptual information, and can also include Google Image search results where applicable. Users can click on a term to generate a new search from that term, while image results can be rearranged by clicking and dragging them to the desired location. Casual can produce visualizations ranging from 10 to 400 concepts in size, and can retrieve information for queries in a wide variety of languages. This tool is no longer supported; development appears to have ceased in 2009.

This software scans one or many Word DOCX, text and text-like files (e.g. HTML and XML files) and counts the number of occurrences of the different words or phrases. There is no limit on the size of an input text file. The words/phrases which are found can be displayed alphabetically or by frequency. The program can be told to allow or disallow words with numerals, hyphens, apostrophes, underscores or colons, to ignore words which are short or which occur infrequently, and to ignore words (e.g., common words such as 'the', a.k.a. stop words) contained in a specified file. It can also count only words or phrases in a specified list (optionally with pattern-matching). Results can be exported to Excel for further processing. The program works with text in most European languages, and supports the use of regular expressions for specifying words/phrases to count.

This software scans a Word DOCX file or a text file (including HTML and XML files) with text encoded via ANSI or UTF-8 and counts the frequencies of different words. The words which are found and displayed can be ordered alphabetically or by frequency. Characters which can appear in words can be specified, so the program can be told to allow or disallow words with numerals, hyphens, apostrophes, underscores or colons, to ignore words which are short or which occur infrequently, to treat upper/lower case as significant or not, and to ignore words (e.g., common words such as 'this', a.k.a. stop words) contained in a specified file. This software may be used with text in most European languages. The language of the text is detected automatically and (if supported) the corresponding stop words file is optionally loaded. Results can be exported to Excel for further processing. There is also an Advanced Version with greater functionality.

NowComment makes it easy to have rich, engaging discussions of online documents no matter how large (or small) your class or collaboration group. It's fast, powerful, and feature-rich: you can sort comments, skim summaries, create assignments, hide comments, highlight with multiple colors and meanings, and much more. Integrates to any LMS via LTI. Used in universities and K12 schools for the past 6 years.

Markdown is a text-to-HTML conversion tool for web writers. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML).

Pandoc can convert documents in reStructuredText, textile, HTML, or LaTeX formats to a variety of other formats including XHTML, PDF, EPUB, docx, odt, and more.

WordVenture is an interactive visualization of the WordNet database that employs the technology and interface of TouchGraph.

A software tool capable of performing Optical Character Recognition (OCR) upon a set of images. It was one of the first OCR recognition software to be developed. It was developed in the late 1980s and sold by Caere Corporation. It is currently owned by Kofax Inc. It achieves the task by analysing pixel sets and in an image and cross-matching them to a dictionary of words. Omnipage automates large sections of the digitisation process enabling physical objects to be scanned, processed using the OCR software and exported to a document file format. Later versions of the software incorporate image enhancement features to improve scan quality (and recognition results) and better support for complex page layouts and forms.

Features:

Integration with scanning software

Maintain layout of captured document