Just normal KDE plasma panel and some widgets, (from left to right and all of these widgets are built in to KDE except "Application title bar" you can download it from KDE's widget store): Notification, Application title bar (buttons only), Icon only task manager, Global menu, Application title bar(Name only), [Spacer] digital clock, [Spacer] Applications launcher, Colors picker, System trays
Thanks you, I'm not using any windows tiling I just arranged it manually but I think you can install one, for hiding boarders I just use this guide here TLDR:
Navigate: System Settings -> Application Style -> Window Decorations
Click one of the themes context menu icon
Navigate: Window Specific Overrides -> Add
Click "Hide window title bar"
Use ".*" for the regular expression to match all windows