JavaScript libraries
jQuery The Write Less Do More JavaScript Library

Geolocation
ipify API is a simple public IP address API easy enough to integrate into any application in seconds

Analytics
Pirsch is a powerful privacy friendly open source alternative to Google Analytics xe2 x80 x94 lightweight cookie free and easily integrated into any website or app

Ecommerce
The World Wide Web Consortium W3C develops standards and guidelines to help everyone build a web based on the principles of accessibility internationalization privacy and security

Email
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JavaScript libraries
A rugged minimal framework for composing behavior directly in your markup