Catalogue - This ia a useful tool when dealing with the content of a large and multi-document corpus. This tool provides an interface for exploring the contents of a noticeably bigger multi-document corpus. It works similar to a library database, giving you the ability to filter documents.
Cirrus - This is a tool to generate a word cloud visualizing the most frequently used words of a corpus or document. Along with the tool of Bubbles and Bubble Lines, this is one more tool that can help you figure out what the main point of any text body would be by showing you the words that are used the most in the text body.
(Source: https://voyant-tools.org/docs/#!/guide/start)
