Qaid (Arabic: قائد qāʾid, "commander"; pl. quwwād), also spelled kaid or caïd, is a word meaning "master" or "leader." It was a title in the Norman kingdom of Sicily, applied to palatine officials and members of the curia, usually to those who were Muslims or converts from Islam. The word entered the Latin language as Latin: gaitus or Latin: gaytus. Later the word was used in North Africa for the governor of a fortress or the warden of a prison, also in Spain and Portugal in the form with the definite article alcayde. It is also used as a male Muslim given name. It furthermore is a designation for leaders of bands of gangsters.
It may refer to
The Cafu Engine is a game engine developed by Carsten Fuchs. It is portable across platforms and currently runs under Windows and Linux, with plans to be adapted to OS X. The engine's source code is freely available under the GPL, but can be obtained under a proprietary license.
In general, Cafu is built with a modular architecture so as to avoid program constructs and libraries that are specific to any given operating system, compiler, CPU or graphics processor. To that end, the Cafu source code compiles both as 32- as well as native 64-bit software.