KDE-gaps is a modification of Arc-Dark by varlesh (https://github.com/PapirusDevelopmentTeam/arc-kde) that removes the title, window buttons, and makes the window decorations completely transparent. KDE-gaps is setup to have a 10px gap between windows to simulate the look of a tiling Window Manager. I suggest setting up the "Quick Tile" hotkeys in KDE's settings for easy window moving (Settings -> Shortcuts -> Global Shortcuts -> KWin).
Arc-Darc 22 days ago
Changed version of Arc-Dark used in the theme in order to give proper credit.