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cdnjs (CDN)

cdnjs is a free distributed JS library delivery service.

Cloudflare (CDN)

Cloudflare is a web-infrastructure and website-security company, providing content-delivery-network services, DDoS mitigation, Internet security, and distributed domain-name-server services.

Google Hosted Libraries (CDN)

Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.

Google Tag Manager (Tag managers)

Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.

HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.

jsDelivr (CDN)

JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.

Lightbox (JavaScript libraries)

Lightbox is small javascript library used to overlay images on top of the current page.

reCAPTCHA (Security)

reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.

Ruby (Programming languages)

Ruby is an open-source object-oriented programming language.

Ruby on Rails (Web frameworks)

Ruby on Rails is a server-side web application framework written in Ruby under the MIT License.