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.

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.

WordVenture is an interactive visualization of the WordNet database that employs the technology and interface of TouchGraph.

WikiMindMap is a mindmapping tool that allows you to browse in wiki content. It uses an interactive interface based on a system of nodes and brackets. Maps may be exported into FreeMind.

WebKruz is a visual search engine that allows you to navigate through the results (web page snapshots) of your query automatically.

WebClust is a meta search engine that clusters documents into meaningful groups. WebClust presents search results in a horizontal topical arrangement, in addition to a single vertical list. WebClust's data mining technique is meant to make sense of large amounts of textual information extracted from the web, including digital libraries.

VisuWords is a mindmapping linguistic tool that shows the relationships between the queried word and related words in an interactive map, with corresponding definitions.

TuneGlue is a music search engine that generates and connects nodes containing artist names related to the one queried, and networks the related artists in an interactive web.

Tianamo (beta) is an information visualization search engine that displays the search results in a 3D landcape where subtopics are presented topographically as peaks.

Tianamo is no longer online and the link bounces to a Chinese commerce site.

Silobreaker is a search engine that aggregates the news from numerous sources and presents the contents in various visualization formats.