View search results over time by entering a word or phrase, comparing multiple terms if desired. Choose to graph either the frequency of your search term (the number of documents per year) or its popularity (the percent of the total documents each year). By clicking on a point on the graph, retrieve search results for that year or, by clicking and dragging, select a time period to zoom in on.
Google Books Ngram ViewerWhen you enter phrases into the Google Books Ngram Viewer, it displays a graph showing how those phrases have occurred in a corpus of books (e.g., "British English", "English Fiction", "French") over the selected years.
Tapor: TAPOR 3 is not yet functioning. http://portal.tapor.ca/portal/portal Text Analysis Portal for Research.: "TAPoR is a gateway to tools for sophisticated analysis and retrieval, along with representative texts for experimentation."
SEASR : http://seasr.org/ "The Software Environment for the Advancement of Scholarly Research (SEASR), funded by the Andrew W. Mellon Foundation, provides a research and development environment capable of powering leading-edge digital humanities initiatives."
Tableau AcademicIf you are a full time student, you can sign up for a free account with Tableau Academic. You will need to provide proof of enrollment (Student ID or Course List.)
TokenX : tokenx.unl.edu Created by the Center for Digital Research in the Humanities, University of Nebraska - Lincoln.
TextArc : http://www.textarc.org/ by W. BRADFORD PALEY, interaction designer (a visualization tool) "A TextArc is a visual representation of a text—the entire text (twice!) on a single page. A funny combination of an index, concordance, and summary; it uses the viewer's eye to help uncover meaning."