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\section{The Octopus code}  Octopus was started in 2002 2000-2001  in the group of professor Angel Rubio at the University of the Basque Country UPV/EHU in San Sebastian, Spain (or Donostia, as the city is called in the native Basque language). Valladolid.  The main feature of Octopus is real-time TDDFT propagation, a method that have been recently proposed at the time for the calculation of excited states properties. This method has now been implemented in several electronic structure packages \cite{Schleife_2012,Schleife_2014,Walter_2008,Meng_2008,Ren_2010} and used for different types of calculations \cite{Alonso_2008,Andrade_2009}. Octopus was designed using the principles of object oriented programming, within the limitations of the Fortran 95 language. This means that the code is quite flexible and modular. It can provide