The CircleMUD License

CircleMUD was created by:

Jeremy Elson
Department of Computer Science
Johns Hopkins University
Baltimore, MD 21218 USA

Update from the year 2020

The CircleMUD license is now LGPL.

CircleMUD was derived from DikuMUD, and as such inherited the DikuMUD license. It prohibited commercial use and had some other unusual requirements, such as that the authors' names must be displayed on the login screen.

Some 30 years after its creation, members of the community successfully lobbied the DikuMUD creators to change the license to a more permissive one that is standard in the open source community. In 2020, the creators of DikuMUD agreed to relicense DikuMUD as LGPL.

This has allowed me (Jeremy Elson) to follow suit and similarly relicense CircleMUD as LGPL.

I am surprised and flattered that folks considered these old MUD codebases valuable enough in 2020 to press for a license change. In the spirit of open source I am happy to oblige.

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Last updated: 4 July 2020