Maxmind discountinued old GeoLiteCity.dat database, and their new project no longer works in old prestashop 1.6.x. In this case you need to use geolocation file with old structure. Download it here.

In this guide you can read how to create Amazon APP that will be a kind of bridge between your prestashop and amazon. Thanks to this "amazon login" module will work properly.

How to run hooks with webservice while new customer account is created? Complete step by step guide.

Tutorial that shows the way of how to build feature that displays selected "color" attribute name. Really minor modification that creates cool feature to show name of the color.