David Morgan-Mar is an Australian software developer and author known for his work in the field of programming and game design. He is particularly recognized for creating the popular online game MUD (Multi-User Dungeon), which laid the groundwork for many modern multiplayer online games. His contributions to the gaming community have influenced the development of interactive storytelling and virtual worlds. In addition to his work on MUD, Morgan-Mar has developed various software tools and libraries, including MUDlet, a client for playing MUDs. He is also an advocate for open-source software and has contributed to several projects, promoting collaboration and innovation within the tech community.