Alternatives to Google Analytics

I am interested to learn more about open source analytics to use with a jekyll site. The reason for this is I only want to track one metric, which is goal completion (success from one page to the next). For the sake of learning I ideally don’t want to use anything that requires I sign up for a service.

The most logical place to start:

which leads you to :

Something else I found but seems like a lot of work to integrate: