Tools

ImagePlot

ImagePlot is a free software tool that visualizes collections of images and video of any size.

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LimeService is basically the hosted version of the GNU licensed LimeSurvey. It is a survey service-platform to prepare, run and evaluate on-line surveys. Besides basic free usage you are always getting the full feature set with no monthly fees or subscription plans. I've used it before and found it to pretty robust.

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Text Variation Explorer

TVE is an interactive Java tool for exploring the effect of window size on three common linguistic measures: type-token ratio, proportion of hapax legomena, and average word length. In addition, TVE can cluster the text fragments according to a user-given set of words by applying principal component analysis (PCA).

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Annotating

LitBlitz Literature Notes Manager

LitBlitz is free beta Chrome extension that aims to improve how students and researchers manage their notes for literature reviews, assignment research and more by simplifying pdf management, allowing capture and annotation of document snippets LitBlitz v1.0 is currently available as a Google Chrome extension. LitBlitz, while still available on the Google Chrome store (https://chrome.google.com/webstore/detail/litblitz-speed-up-your-li/ohmfdhillclkchlgoifgokmdjhonmgao?authuser=4&hl=en) no longer appears to be under development, and the company url redirects to a Japanese language web page.

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Diagram.ly

draw.io is an online diagramming application built for speed, reliability and simplicity. It features the full range of visual configuration you expect, as well as web application features such as a full range of export options, a large collection of icons, real-time collaboration and embedded widget sharing. It features particularly notable integration with a variety of collaborative platforms including Google Docs/Apps.

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Annotating

Digress.it

Digress.it was a free, open source WordPress plugin for annotating texts on the paragraph level, particularly of article to book-length documents. It permitted blog-like threaded discussions to occur in the margins of the text, and was aimed at facilitating scholarly, literary, political and other discussions. While the main website is no longer available, Digress.it is still available via the WordPress plugin directory .

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Search

Casual

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.

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Search

Carrot2

Carrot2 is a free, open source search clustering engine with additional document categorization functions. For each set of search terms, Carrot2 provides a topic tree and subtopics built from the search results, and generates visualizations that enable users to quickly overview their search. Searches can be filtered according to source, such as Bing, image files or the Wikipedia, results can be clustered according to several presets such as K-means or URL, or filtered by country and langauge. Carrot2 enables users to download results in ranges from 50 to 200 for further analysis.

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Search

SARIT (Search and Retrieval of Indic Texts)

SARIT (Search and Retrieval of Indic Texts) is a library of Indic texts with tools for search, retrieval and analysis built into the website. This includes options to apply a KWIC or concordance encompassing all matching texts for a site search. SARIT was developed from a modified version of PhiloLogic. The full SARIT collection with TEI-compatible markup is also available via Github.

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Analysis

RSiena

RSiena is a free, open source social network analysis package for R. It replaces Siena (Simulation Investigation for Empirical Network Analysis), which was a stand-alone program for Windows. Like its predecessor, RSiena is optimized for social network data, but is also applicable to other forms of network data, and relies on Markov chain models to generate network dynamics. T his approach is best applied to data where relations between actors and their behaviour can be treated as a state rather than as an event. Users not familiar with R can run RSiena via the provided graphical user interface.

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