WordSmith Tools is a commercial integrated suite of programs designed to analyze word behaviour in a text. It can be used to generate a list of all words or word clusters, concord, find keywords and more. This tool is recommended for publishers, language teachers and students, and language researchers. 

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).