Wordle is an online toy for generating word clouds using the text you provide.  Text can be submitted by providing an URL or by pasting raw text into an input.  The most frequent words from the text are then used as the source for the resulting visualization, where frequency is used to determine the size of each word.

You may customize the output by choosing from a variety of display options (layout, font, colours) or use the randomize feature to get a random visualization.  Additionally, there is built-in stop word support for many common languages, and the option to change the word case.

Cirrus is a visualization tool that displays a word cloud relating to the frequency of words appearing in one or more documents. One can click on any word appearing in the cloud to obtain detailed information about its relativity.

Corpus Grid shows an overview of the corpus, including each document's title, number of word tokens (total words), number or word types (unique words), and lexical density (the ratio of tokens to types).

Corpus Summary is a tool that provides a simple, textual overview of the current corpus. Features of this tool include number of words, number of unique words, longest documents, highest vocabulary density, most frequent words, notable peaks in frequency, and distinctive words.

Corpus Term Frequencies shows overall word frequencies for the entire corpus as well as information about how word frequencies are spread out over documents within the corpus. Hover over column headers and buttons for more information.

Document Term Frequencies shows word frequencies for each document in the corpus. You can see the selected word at the top of the window highlighted in yellow. Its relevance to the documents is shown in the table below.

Reader acts as a method of reading all documents within a specified corpus. It does not provide text analysis but rather a method of viewing the contents of a corpus.

Flowerbed is a simple visualization tool for viewing up to two documents. Each document is presented as a “flowerbed”, wherein each word is a flower. The height of the flower is determined by the relative frequency of that word within the document. The petals on each flower represent features associated with the word. When two documents are present in chosen the corpus, the second is mirrored below the first. In this way it is possible to do a cursory comparison of the documents.

FeatureClusters is a visualization tool for viewing associations between words, based on commonalities in the feature sets of the words. This is illustrated using a force-directed graph, wherein each word is a node in the graph. Nodes are connected to one another if they share the same feature. Features are represented by the smaller circles (or petals) which surround each word. Moving your mouse over a word will show the feature details associated with that word. Clicking on a word will highlight its connections to other words.

This tool extracts all the URLs, except image sources, in an HTML text. It also converts relative links to clickable absolute links.