The Virtual Observatory is an international initiative on standardizing astronomical data and protocols, as well as the development of scientific tools. Nowadays, the Virtual Observatory (VO) offers a number of powerful tools to manipulate and analyze catalogs, images, spectra and, of course, to inter-operate with the Virtual Observatory archives. In the SIE, we resume our SIEminar series, short and technical seminars, like this one in which Jorge will present the most interesting tools the Virtual Observatory offers.