Anti-bot CAPTCHA widget that helps digitize books by providing snippets of books for people to enter the text for. Owned by Google.
Sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development.
This site uses the viewport meta tag which means the content may be optimized for mobile content.
Stripe is a developer-friendly way to accept payments online and in mobile apps.
Website using the € symbol on their website - meaning it may accept payment in Euros.
Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. This metric displays sites that are using Django + CSRF.
Python is a widely used general-purpose, high-level programming language. Its design philosophy emphasizes code readability, and its syntax allows programmers to express concepts in fewer lines of code than would be possible in languages such as C. The language provides constructs intended to enable clear programs on both a smal...
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
Open graph description entity tag
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook
This page contains a meta robots tag which tells search engines and robots to index or not index the page.
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.