Classified as free and open source software (FOSS), Logisim is a delightful tool that can easily be used to reinforce a solid understanding of the theoretical concepts related to a digital logic design course. Unlike LogicWorks, one of the most attractive features of Logisim is its ability to include user built libraries. This can result in the development of a library that models the complete set of integrated circuits (ICs) required for a digital logic design course. As a consequence, numerous merits can be observed regarding a student's learning level within such a course.