This document provides a list of 4 free software that are essential for graduate students to have. It recommends free online tools to check English skills at http://www.gingersoftware.com, check for plagiarism in articles at http://www.scanmyessay.com, and manage bibliographies at http://www.mendeley.com as an alternative to the paid EndNote software. The document also mentions 3 free software that are important for students to have but does not provide any details.