DCK

Doom Construction Kit (abbreviated as DCK) is a sector-based DOS level editor created by Ben Morris. It is similar to DEU in many respects; for example, DCK is mode-based.

Versions of DCK before v2.2f were free to download; versions after this must be bought to be used. However, older versions can still be downloaded and have the same features as later versions.

The source code was made available on June 25, 2020.