Internet of Musical Things (IoMusT) is one of several subfields of the Internet of Things (IoT) and it relates to several areas of study, such as ubiqui- tous and mobile music, human-computer interaction, new interfaces for musical expression and participatory art. This paper makes a bibliographic review on the general definitions of this field, explaining what Musical Things are, clas- sifying them according to their behavior and communication role, in addition to discussing their applications in Ubimus. Among the contributions to IoMusT research, the authors also discuss the social, economic and environmental chal- lenges faced in this area.