Google Charts (formerly the Google Visualization API) is a web-based interface for interactive data visualization via HTML5 and SVG. It includes a number of preset chart types ranging from line charts to word trees and all are customizable. A separate selection of user community contributed chart types is also available. Within a chart, the API identifies events that users can trigger with presets ranging from simple clicks to Javascript methods, and enable users to construct chart dashboards that can be embedded in their website along with the chart proper.

Sifter provides search and retrieve access to every undeleted Tweet in the history of Twitter. Users can submit three historical Twitter estimate requests per day using a variety of Gnip PowerTrack rules. When the query is done, Sifter generates an email estimating the approximate number of tweets responsive to the query and the cost to get access to the data via DiscoverText. Once the data is licensed by Texifter, we store the Tweets in a free trial Enterprise DiscoverText account where you can perform advanced text analytics to search, filter, cluster, code, and machine classify the data.

The DataTank is an open source tool that publishes data, stored in text-based files (e.g., CSV, XML, JSON) or in binary structures (e.g., SHP files, relational databases). The DataTank reads data from these structures and publishes them to the web using a URI as an identifier, providing these data in any format a user wants regardless of the original data structure. The DataTank requires a server with Apache2 or Nginx, mod rewrite enabled, PHP 5.4 or higher, Git, any database supported by Laravel 4.

Features

Turn any dataset into a RESTful HTTP API

Allows published data to be requested in any web-readable format or visualization

Improves the ease, openness, and transparency of data consumption

Enables data consumers to immediately begin working, without needing to download raw data files

Provides visualizations for immediate data interpretation and information gathering by civilians

Resources

The DataTank demo

Documentation

GitHub

Mapstraction is a Javascript library. It provides developers with a single interface for a wide variety of Javascript map APIs including Leaflet, Google, Bing, OpenLayers and ESRI's ArcGIS.

A key benefit is that once a developer has loaded Mapstraction, s/he can to switch from one map API to another quickly and easily - often only needing to change a few lines of code.

Mapstraction displays points, lines, polygons and markers on the maps, and also allows developers to add base maps and overlays.