GNUstep is described as ''s core framework provides open source version of the Cocoa's (formerly known as OpenStep from NeXT) APIs and tools for as many platforms as possible' and is a desktop environment in the development category. There are more than 25 alternatives to GNUstep for a variety of platforms, including Linux, BSD, Windows, Mac and Chrome OS apps. The best GNUstep alternative is KDE Plasma, which is both free and Open Source. Other great apps like GNUstep are GNOME, Xfce, Cinnamon and MATE.
Bluetile is a tiling window manager for Linux, designed to integrate with the GNOME desktop environment. It provides both a traditional, stacking layout mode as well as tiling layouts where windows are arranged to use the entire screen without overlapping.
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