Software: Maven's Citadel (MavenCit) Author: Norman Hamer (aka The Maven) Supported: Early 1990s through at least 1996 Platform: MS-DOS Language: Borland C++ Derived from: Dragon's Citadel Perhaps the most innovative feature of MavenCit was EFS: External File System. It is a much-improved file-transfer system, similar to many linear systems (such as WildCat! etc.).