Geolocation
Free tools or API for IP address geolocation lookup which enable you to track the visitor s location IP information in real time Supported both IPv4 IPv6

Analytics
Clicky s privacy friendly real time website analytics service is simply the best way to monitor analyze and react to your website s traffic in real time

JavaScript libraries
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Since 1983 developing the free Unix style operating system GNU so that computer users can have the freedom to share and improve the software they use