Anam, it is not clear what you mean by an Open Application. But NEET is the entrance examination for admission to all Medical Colleges across India. In India we have Government Medical Colleges, Private Medical Colleges, Deemed and Central Universities. All seats in these colleges are filled through NEET score alone. Now even AIIMS and JIPMER will also consider NEET score for admission to their respective Institutions. And now to study MBBS abroad, qualifying in  NEET is mandatory.