As of Jan 2019, the site of Planeta Linux is officially gone. You can read about it here: https://damog.net/blog/2019/01/12/Adios-sitio-de-Planeta-Linux/
Planeta Linux is Latin America's largest community for users, developers and enthusiasts of Linux and FLOSS. It has been operating and growing since 2004.
This git repository contains everything that powers the website. Technical details can be found here: http://damog.net/blog/2009/11/11/the-new-planeta-linux-engine/