High Quality Content by WIKIPEDIA articles! The Tilery is an application switcher and utility for the Mac OS, which places tiles on the user`s desktop for each open application. It was written by Rick Holzgrafe, and first released in 1991 for System 7 by Semicolon Software. The Tilery has not been released for Mac OS X but as The Tilery is based on the Dock from NEXTSTEP, it is very similar to OS X`s Dock. DragThing is seen as its replacement, with more features and compatibility with Mac OS X. The last version of The Tilery was 4.2.1, released on April 9th, 2001.