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Charmstone - The quicker switcher launcher for macOS
Witch - Welcome to the world of W. i. t. c. h.
SwitchGlass - Customizable app switcher for Mac
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Compiz - Project information. Maintainer: PS Project Management Team. Driver: Compiz Maintainers. Licence: GNU GPL v2, GNU LGPL v2. 1, MIT / X / Expat Licence.