DATA.SFGOV.ORG

nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.

Rack::Cache is a component to enable HTTP caching for Rack-based applications such as Rails.

Ruby on Rails is an open-source web framework that is optimized for programmer happiness and sustainable productivity. Note that Ruby on Rails has two detection techniques and this is one of them.

Ruby on Rails is an open-source web framework that is optimized for programmer happiness and sustainable productivity.

JQuery is a fast, concise, JavaScript Library that simplifies how you traverse HTML documents, handle events, perform animations, and add Ajax interactions to your web pages. jQuery is designed to change the way that you write JavaScript.

HTML5 Canvas for Internet Explorer

Allows users to Like items they find on the web, similar to how you Like items within Facebook.

Widget for submitting Zendesk support tickets.

The AJAX Libraries API is a content distribution network and loading architecture for the most popular, open source JavaScript libraries.

A family of web feed formats used to publish frequently updated content such as blog entries, news headlines or podcasts.

The website claims XHTML strict. XHTML Strict is the same as HTML 4.01 Strict but follows XML guidelines. See the link for more information.

The website uses conditional comments that are supported by Microsoft Internet Explorer. They allow web developers to show or hide HTML code based on the version of the viewer's browser.

The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook

Allows a website to define how a page is rendered in Internet Explorer 8, allowing a website to decide to use IE7 style rendering over IE8 rendering.

Frames Google Chrome window into Internet Explorer for HTML 5 compatibility.

This page contains an icon for iPhone, iPad and iTouch devices.

The OpenSearch description document format can be used to describe a search engine so that it can be used by search client applications.

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML

JavaScript is a scripting language most often used for client-side web development. Its proper name is ECMAScript, though "JavaScript" is much more commonly used. The website uses JavaScript.

The X-Frame-Options HTTP response header can be used to indicate whether or not a browser should be allowed to render a page in a frame or iframe. Sites can use this to avoid clickjacking attacks, by ensuring that their content is not embedded into other sites.

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.

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