Neurofeedback (NFB) training is a technique that claims that an individual can modulate their own brain signals - and consequently brain states - via self-regulation during a brain signal acquisition procedure. The most used brain signal acquisition technique for NFB has been electroencephalography (EEG). Thus, the goal of this work was to develop a software prototype for NFB training using EEG that extracts a given feature from the EEG signal and returns it to the user and the experimenter.