Nominatim is a tool to search osm data by name and address and to generate synthetic addresses of osm points (reverse geocoding). Nominatim is also used as one of the sources for the Search box on the OpenStreetMap home page and powers the search on the MapQuest Open Initiative websites.
Visualization
yWorks is a powerful set of tools for creating diagrams using any number of frameworks. There are tools for working with HTML, FLEX, AJAX, Silverlight, Java and .NET. yEd is also available from the yWorks site. This free graph editor can be used to create diagrams manually, or to import data for analysis.
Visualization
Time Flow is an open-source timeline built to help journalists analyze temporal data. The application offers several view modes--timeline, calendar, list, table--to help explore thousands of data points. It is not a web-based tool--it is a desktop application that can run off a thumb-drive and is built to handle large datasets, and timeline events that may include approximate dates or date spans. The project is in the alpha stage of development, but is available for download from Github.
Analysis
GRETL () s a cross-platform software package for econometric analysis, written in C. It features: Easy intuitive interface (now in French, Italian, Spanish, Polish, German, Basque, Portuguese, Russian, Turkish, Czech, Traditional Chinese, Albanian and Greek as well as English) A wide variety of estimators: least squares, maximum likelihood, GMM; single-equation and system methods Time series methods: ARMA, GARCH, VARs and VECMs, unit-root and cointegration tests, etc. Limited dependent variables: logit, probit, tobit, interval regression, models for count and duration data, etc. Output models as LaTeX files, in tabular or equation format Integrated scripting language: enter commands either via the gui or via script Command loop structure for Monte Carlo simulations and iterative estimation procedures GUI controller for fine-tuning Gnuplot graphs Links to GNU R, GNU Octave and Ox for further data analysis
Visualization
Protovis composes custom views of data with simple marks such as bars and dots. Unlike low-level graphics libraries that quickly become tedious for visualization, Protovis defines marks through dynamic properties that encode data, allowing inheritance, scales and layouts to simplify construction. Protovis is free and open-source, provided under the BSD License. It uses JavaScript and SVG for web-native visualizations; no plugin required (though you will need a modern web browser)! Although programming experience is helpful, Protovis is mostly declarative and designed to be learned by example. Protovis is no longer being developed. The developers have moved on to a new visualization library, D3.
Visualization
D3.js is a data visualization library by Mike Bostock, who is also the primary creator of Protovis, which D3 is designed to replace. There is a great introductory tutorial available from Luke Franci. It is one of many other tutorials linked to from Bostock's D3 wiki.
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.
Gathering
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.